JP7612413B2 - Work equipment - Google Patents

Description

The present invention relates to a work machine for cultivating a field and planting seedlings, for example.

2. Description of the Related Art A working machine disclosed in Japanese Patent Application Laid-Open No. 2003-233691 is known.
The working machine disclosed in Patent Document 1 can perform ground work (tilling, etc.) and plant (transplant) seedlings while traveling. The working machine includes a tractor, a rotary tiller attached to the rear of the tractor, and a transplanter attached to the rotary tiller. The rotary tiller includes a tilling section for tilling a field, and is equipped with a ridger for forming ridges in the tilled field, and a mulch film laying device for laying mulch film on the ridges. The mulch film laying device includes a film roll support shaft, a film presser, a soil covering member, etc.

JP 2018-29 A

The working machine described in Patent Document 1 is equipped with a groove cutting member that forms an embedding groove for embedding the widthwise end of the mulch film that is unwound from the film roll and laid in the ridges. However, this groove cutting member forms the grooves after the ridges have been formed by the ridge builder, and does not form the ridges by cutting grooves in the field. Furthermore, when the tilling depth in the tilling section changes, the groove depth (the distance from the surface of the ridge to the bottom of the groove) also changes. In laying mulch film, it is preferable for the groove depth of the ridges to be constant, but with the conventional working machine, the groove depth changes in response to changes in the tilling depth and was not constant.

The present invention aims to provide a farm machine that can cut furrows in a field to form ridges and keep the depth of the furrows constant.

A working machine according to one embodiment of the present invention comprises a tilling section for tilling a field, and a furrow cutting member for cutting furrows in the field tilled by the tilling section to form ridges, the tilling section having tilling tines that rotate around a horizontal axis, a rotary machine frame for rotatably supporting the horizontal axis, and a rear cover attached so as to be swingable in the vertical direction relative to the rotary machine frame and covering the rear of the tilling tines, the furrow cutting member being a ridge forming device for forming flat ridges in the field, attached to the rear cover and swingable together with the rear cover.

The groove cutting member is attached to a mounting frame attached to the rear cover and is movable along the mounting frame in a direction parallel to the horizontal axis.
The system also includes a mulch film laying device that lays mulch film on the ridges, the mulch film laying device having a film pressing roller that presses down the widthwise ends of the laid mulch film, and the film pressing roller rolls along the grooves cut by the groove cutting member to bend the ends.

The mulch film laying device also has a soil covering member that covers with soil the end of the mulch film that has been folded by the film pressing roller.
The system also includes a mulch film laying device that lays a mulch film on the ridges, a planting device that plants seedlings in the ridges on which the mulch film has been laid, irrigation tubes that supply water to the seedlings planted by the planting device, and irrigation tube guides that support the irrigation tubes, and the irrigation tube guides are attached to the mounting frame.

The groove cutting member also has a bottom plate consisting of a flat plate having a rectangular shape in a plan view that forms the bottom surface of the groove, a front plate that rises diagonally forward and upward from the front edge of the bottom plate, a rear plate that rises upward from the rear edge of the bottom plate, and side plates that rise vertically upward from the side edges of the bottom plate and form the sides of the ridges approximately vertically .
The groove cutting member further includes a plurality of groove cutting members for forming a plurality of ridges, the plurality of groove cutting members being attached to the mounting frame at intervals in a direction parallel to the horizontal axis.

According to the above configuration, the furrow cutting member can cut furrows in the field to form ridges (flat ridges). In addition, since the rear cover is attached to the rotary machine frame so that it can swing up and down, the rear cover follows the surface of the field even if the tilling depth of the tilling section varies. Since the furrow cutting member is attached to the rear cover and can swing together with the rear cover, the depth of the furrow formed by the furrow cutting member is constant from the surface of the ridge regardless of variations in the tilling depth.

FIG. FIG. FIG. FIG. FIG. 2 is a side view of the tilling section and the mulch film laying device. FIG. 6 is a bottom view of FIG. 5 . FIG. 7 is a plan view of FIG. 6 . FIG. 8 is an enlarged view of the left part of FIG. 7 . FIG. 9 is a perspective view of FIG. FIG. 8 is an enlarged view of the center portion in the width direction of the machine of FIG. 7 . FIG. 11 is a perspective view of FIG. The upper part shows a plan view of "groove cutting members for flat ridges, film holding rollers, soil covering members, blades, mulch film, etc.", and the lower part shows a cross-sectional view of "the formed flat ridges, seedlings, mulch film with folded edges, and soil covering the mulch film." FIG. 6 is a diagram of the "high ridge" type corresponding to FIG. 5. FIG. 8 is a diagram of the "high ridge" type corresponding to FIG. 7. FIG. 9 is a diagram of the "high ridge" type corresponding to FIG. 8. FIG. 10 is a diagram of the "high ridge" type corresponding to FIG. FIG. 11 is a diagram of the "high ridge" type corresponding to FIG. 10. This is a diagram of "high ridge use" corresponding to Figure 11. This is a diagram of "high ridge use" corresponding to Figure 12. This is an oblique view showing the "mounting structure" on the left side in the aircraft width direction as viewed from the inside (right side) of the aircraft. 21 is a perspective view showing the "mounting structure" of FIG. 20 as viewed from the outside (left side) of the aircraft body. FIG. 2 is a perspective view showing the "mounting structure" at the center in the width direction of the machine as viewed from the right side. FIG. 4 is a front view for explaining the mulcher film mounting structure. FIG. 24 is an enlarged view of the left half (first roll support shaft) of FIG. 23 . 4 is a plan view of the other end side (other support portion) of the first roll support shaft and the second roll support shaft. FIG. FIG. 2 is a perspective view of one end side (one supporting portion) of a first roll support shaft. 4 is a perspective view of the other end side (other support portion) of the first roll support shaft and the second roll support shaft. FIG. In FIG. 27, the roll support shaft is shown by a virtual line (two-dot chain line), and the locking member is omitted. 4A is a cross-sectional view showing the locking member in an unlocked state, and FIG. 4B is a cross-sectional view showing the locking member in a locked state. FIG. FIG. 4 is a plan view of the first ridger. FIG. 4 is a bottom view of the first ridger. FIG. 4 is a rear view of the first ridge creator. FIG. 11 is a perspective view showing another embodiment of the first ridger as viewed from the left front. FIG. 11 is a perspective view showing another embodiment of the first ridger as viewed from the right rear. This is a diagram to explain that the planting frame and the mulcher arm are connected by a chain, and that the mulcher arm rises as the planting frame rises. FIG. 13 is a diagram illustrating the mechanism by which the planting section frame rises.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 shows a work machine 1 that can perform ground work (plowing, etc.) and plant (transplant) seedlings while traveling. The work machine 1 has a traveling body 1A and a ground work device 1B attached to the rear of the traveling body 1A. The ground work device 1B includes a first ground work machine 2 attached to the rear of the traveling body 1A so as to be able to rise and fall, and a second ground work machine 3 attached to the rear of the first ground work machine 2 so as to be able to rise and fall.

In this embodiment, a tractor, which is a traveling vehicle, is exemplified as the traveling body 1A. A rotary cultivator is exemplified as the first ground work machine 2. A transplanter that plants seedlings in a field is exemplified as the second ground work machine 3. Hereinafter, the traveling body will be referred to as the tractor 1A, the first ground work machine will be referred to as the rotary cultivator 2, and the second ground work machine will be referred to as the transplanter 3.
The traveling body 1A is not limited to a tractor, and may be another traveling vehicle. The first ground work machine 2 is not limited to a rotary tiller, and may be any machine that works on a field. Although the rotary tiller 2 is exemplified as a center drive type rotary tiller, it may be a side drive type rotary tiller.

Figure 1 shows a side view of the work machine 1. Unless otherwise specified in this embodiment, the front side of the driver seated in the driver's seat 5 of the tractor 1A (left side in Figure 1) will be described as the front, the rear side of the driver (right side in Figure 1) as the rear, the left side of the driver (near side in Figure 1) as the left side, and the right side of the driver (rear side in Figure 1) as the right side. In addition, the horizontal direction K2 (see Figure 3), which is perpendicular to the fore-and-aft direction K1 (see Figure 1) of the tractor 1A, will be described as the machine width direction K2.

Further, the direction from the center of the tractor 1A in the machine width direction to the right or left will be described as the machine width outward. In other words, the machine width outward is the direction in the machine width direction K2 that moves away from the center of the tractor 1A in the machine width direction. The direction from the right or left side of the tractor 1A in the machine width direction to the center will be described as the machine width inward. In other words, the machine width inward is the direction opposite to the machine width outward. In other words, the machine width inward is the direction in the machine width direction K2 that moves closer to the center of the tractor 1A in the machine width direction.

As shown in Fig. 1, the tractor 1A has a body 6 and a traveling device 7 including front wheels 7F attached to the front part of the body 6 and rear wheels 7R attached to the rear part of the body 6. The body 6 has a prime mover (drive source) E1 and a power transmission case T1 connected to the rear part of the prime mover E1. The prime mover E1 drives the traveling device 7.
The prime mover E1 is, for example, a diesel engine, or may be a gasoline engine, an LPG engine, or an electric motor, or may be a hybrid type having an engine and an electric motor.

The power transmission case T1 is configured by directly connecting a clutch housing incorporating a clutch, a transmission case incorporating a speed change device, a differential case incorporating a differential device, and the like.
A driver's seat 5 is mounted on the rear of the vehicle body 6, and a power take-off shaft (PTO shaft) 22 for taking off the power of the prime mover E1 is provided in a rearward protruding manner. That is, the traveling vehicle 1A has the power take-off shaft 22 for taking off the power of the prime mover E1. A steering wheel 8 is provided in front of the driver's seat 5. The tractor 1A also has a battery (not shown) mounted on the front.

As shown in FIG. 1, the rotary tiller 2 is mounted to the rear of the tractor 1A via a mounting mechanism such as a three-point linkage 9 so that it can be raised and lowered. The three-point linkage 9 has a top link 9A and a lower link 9B, and is mounted to the rear of the vehicle body 6. A lift link 10A that can swing up and down is provided to the rear of the vehicle body 6, and the lift link 10A is connected to the lower link 9B via a lift rod 10B. The lift link 10A is driven to rise and fall by a hydraulic device 10C provided at the upper rear of the vehicle body 6, and the lower link 9B is raised and lowered as the lift link 10A moves up and down. This causes the rotary tiller 2 to rise and fall.

The rotary tiller 2 has a transmission case 12 that receives the power of the PTO shaft 22 of the tractor 1A via a universal joint (not shown). The transmission case 12 is located at the center of the width direction of the rotary tiller 2 (the same direction as the machine width direction K2).
2 and 3 are detailed views of the ground work apparatus 1B. The ground work apparatus 1B has a rotary cultivator 2 and a transplanter 3.

The rotary cultivator 2 has a rotary machine frame 11, and the transplanter 3 has a transplanter frame 37. The rotary machine frame 11 and the transplanter frame 37 are connected to each other so as to be movable up and down by a connecting mechanism 41 consisting of a parallel link mechanism. This allows the rotary cultivator 2 and the transplanter 3 to move relative to each other in the vertical direction.
As shown in Fig. 3, the rotary tiller 2 has the transmission case 12 at the center in the width direction K2. As shown in Fig. 2, a rotating shaft 16 is provided at the bottom of the transmission case 12. The rotating shaft 16 is provided so as to protrude from the bottom of the transmission case 12 to one side and the other side in the width direction K2. A large number of tilling tines 17 (see Figs. 5 and 6) are fixed to the outer periphery of the rotating shaft 16 via brackets. When the rotating shaft 16 rotates around its axis, the tilling tines 17 till the field and dump the tilled soil to a rear cover 19B at the rear. The rotating shaft 16 and the tilling tines 17 constitute a tilling unit 18 that tills the field.

As shown in Figures 2 and 3, soil piling disks 56L, 56R are arranged in front of the rotary tiller 2. The soil piling disks 56L, 56R are members for piling soil inwardly of the machine width toward the tilling section 18. The soil piling disk 56L is arranged on one side (left side) in the machine width direction, and is located at the left front of the rotary tiller 2. The soil piling disk 56R is arranged on the other side (right side) in the machine width direction, and is located at the right front of the rotary tiller 2. The soil piling disks 56L, 56R are arranged at an angle so that they move from the outside of the machine width to the inside of the machine width as they move from the front to the rear in a plan view.

As shown in Figure 2, a ridge forming device A is provided at the rear of the rotary tiller 2. The ridge forming device A forms ridges UN (see Figure 12) in a field that has been tilled by the tilling section 18. In this embodiment, two ridges UN1, UN2 are formed as shown in Figure 12, however, the number of ridges formed in the present invention is not limited to two.
A mulch film laying device 300 is provided behind the ridge forming device A. The mulch film laying device 300 is provided at the rear of the rotary tiller 2 and located in front of the transplanter 3. The mulch film laying device 300 lays a mulch film 300F on the ridges UN (see FIG. 12).

2, the transplanter 3 has a seedling supplying device 38, a planting device 39 provided below the seedling supplying device 38, a soil covering device 40 provided behind the planting device 39, and a seedling placement table 190 provided above the seedling supplying device 38. The seedling placement table 190 is provided in multiple stages and is used to place seedling trays containing seedlings to be transplanted.
As shown in Fig. 3, the seedling supplying device 38 includes a plurality of seedling supplying devices (first seedling supplying device 38A and second seedling supplying device 38B) arranged in the machine width direction K2. A plurality of planting devices 39A, B and soil covering devices 40A, B are provided below the seedling supplying devices 38A, B, respectively (see Fig. 7). The planting device 39 has a planting tool 64 (see Fig. 2) that holds the seedlings from the seedling supplying device 38, descends, and enters the field to plant the seedlings.

The ridge forming device A forms a first ridge UN1 in the field below the first seedling supplying device 38A, and forms a second ridge UN2 in the field below the second seedling supplying device 38B (see Figure 12).
In the first ridge UN1, seedlings supplied from the first seedling supply device 38A are planted in two rows by the planting device 39A. In the second ridge UN2, seedlings supplied from the second seedling supply device 38B are planted in two rows by the transplanting device 39B.

As shown in FIG. 3, front chairs 187A, B and rear chairs 187C, D are provided in front and rear of each seedling supplying device 38A, B.
The front chairs 187A, B are mounted on the rotary machine frame 11 via a connecting mechanism 41 so as to be vertically movable. The rear chairs 187C, D are mounted on a seat frame 197 which is connected to the rotary machine frame 11 via a parallel link mechanism 200. The seat frame 197 is supported on the field by wheels 206.

3, a seedling supply table 188 is provided between each chair 187 and the seedling supply device 38. The seedling supply table 188 is used to place the seedling trays of the seedling placement table 190.
In addition, a spare seedling table 280 for placing a container for accommodating seedling trays is provided above the rotary tiller 2.
<Folding structure of multi-film end>
As shown in Figures 4 and 5, the working machine 1 according to one embodiment of the present invention includes a tilling unit 18 that tills a field, and a furrow cutting member Z that cuts furrows to form ridges in the field tilled by the tilling unit 18. The tilling unit 18 has tilling tines 17 that rotate about a horizontal shaft (rotation shaft) 16, a rotary machine frame 11 that rotatably supports the horizontal shaft 16, and a rear cover 19B that is attached to the rotary machine frame 11 so as to be swingable in the vertical direction and covers the rear of the tilling tines 17. The furrow cutting member Z is attached to the rear cover 19B and can swing together with the rear cover 19B.

Figure 4 is a rear perspective view of the rotary tiller 2. The rotary tiller 2 has a rotary machine frame 11. The rotary machine frame 11 has a transmission case 12, a front support frame 13F, a rear support frame 13R, a left side frame 15L, and a right side frame 15R. The transmission case 12 is located in the center of the width direction (the same direction as the machine width direction K2) of the rotary tiller 2. The front support frame 13F is arranged in front of the transmission case 12 and extends in the machine width direction K2. The rear support frame 13R is arranged behind the transmission case 12 and extends in the machine width direction K2. The front support frame 13F and the rear support frame 13R are connected to the transmission case 12. The left side frame 15L connects the left ends of the front support frame 13F and the rear support frame 13R to each other. The right side frame 15R connects the right ends of the front support frame 13F and the rear support frame 13R.

A mounting portion 13R1 is provided at the center in the width direction of the rear support frame 13R. A central mounting body 196M (see FIGS. 7 and 10), which will be described later, is fixed to this mounting portion 13R1.
As shown in Fig. 4, a rotary cover 19 is provided on the rotary machine frame 11. The rotary cover 19 has an upper cover 19A, a rear cover 19B, and a side cover 19C. The top of the tilling unit 18 is covered with the upper cover 19A. The rear of the tilling unit 18 is covered with the rear cover 19B. The sides of the tilling unit 18 are covered with the side covers 19C.

The upper end of the rear cover 19B is pivotally supported on the rotary machine frame 11 via a pivot 19D around an axis in the machine width direction K2, and is free to swing up and down (see FIG. 5). The rear cover 19B is biased downward by a pair of left and right pressure devices 20. The pressure devices 20 are devices that bias the rear cover 19B downward with the force of a spring. The rear cover 19B moves up and down relative to the rotary machine frame 11 in response to the height (undulations) of the field surface. The rear cover 19B swings up and down relative to the rotary machine frame 11, and the lower end of the rear cover 19B always remains in contact with the ground even if the tilling depth changes.

The mounting frame X is attached to the rear end of the rear cover 19B. The mounting frame X extends in the machine width direction K2. The mounting frame X is made of a long material, and its length is approximately the same as the length of the rear cover 19B in the machine width direction K2. Both ends of the mounting frame X are attached to the rear end of the rear cover 19B via end brackets X1, and the middle part is attached to the rear end of the rear cover 19B via a middle bracket X2.

An irrigation tube guide KY is attached to the mounting frame X. The irrigation tube guide KY will be described later.
A groove cutting member Z is attached to the mounting frame X. The groove cutting member Z is attached to the mounting frame X by a bracket W and a bolt W1. The groove cutting member Z is attached to the mounting frame X in a detachable manner and such that its position in the machine width direction K2 can be freely adjusted (see the groove cutting member Z shown by the imaginary line and the arrow in FIG. 6 ).

The furrow cutting member Z cuts furrows to form ridges UN (see FIG. 12) in the field that has been tilled by the tilling section 18. The furrow cutting member Z is a ridge forming device A for forming flat ridges UN (see FIG. 12) in the field.
In this embodiment, the grooving member Z forms a first ridge UN1 and a second ridge UN2 as shown in Fig. 12. To form one ridge UN, at least a pair of left and right grooving members Z, Z are required. Therefore, the grooving member Z includes a pair of left and right grooving members Z, Z that form the groove of the first ridge UN1, and a pair of left and right grooving members Z, Z that form the second ridge UN2.

The groove cutting member Z is attached to the mounting frame X and can move along the mounting frame X in a direction parallel to the horizontal axis (rotation axis) 16 (machine width direction), so that the width of the ridges UN formed by the groove cutting member Z can be changed. In addition, by attaching multiple pairs of groove cutting members Z to the mounting frame X at intervals in a direction parallel to the horizontal axis 16, multiple ridges UN can be formed simultaneously.

As shown in Figures 4 to 6, the groove cutting member Z has a bottom plate Z1 which is rectangular in plan view and forms the bottom surface of the groove, a front plate Z2 which rises diagonally forward and upward from the front edge of the bottom plate Z1, a rear plate Z3 which rises upward from the rear edge of the bottom plate Z1, and a side plate Z4 which rises upward from the side edge of the bottom plate Z1.
The bottom plate Z1 is a rectangular plate (flat plate) when viewed from above, so the bottom surface of the groove formed by the groove cutting member Z is flat. The inclined front plate Z2 reduces resistance when the groove cutting member Z moves (cuts a groove), and the movement allows the soil to be compacted downward. The rear plate Z3 prevents soil from entering the inside of the groove cutting member Z. The side plates Z4 rise perpendicular to the bottom plate Z1, so the sides of the ridges formed by the side plates Z4 are vertical, and the width of the top surface of the ridges can be made wider than when the sides are inclined.

5, the furrow cutting member Z swings up and down together with the rear cover 19B relative to the rotary machine frame 11, as shown by solid and imaginary lines. The rotary machine frame 11 rotatably supports a horizontal shaft 16, and a tilling section 18 for tilling the field is formed by the tilling claws 17 provided on the horizontal shaft 16. Therefore, when the tilling depth by the tilling section 18 changes, the rotary machine frame 11 moves up and down relative to the surface of the field. On the other hand, the rear cover 19B covering the rear of the tilling claws 17 is attached to the rotary machine frame 11 so that it can swing up and down, so that even if the rotary machine frame 11 moves up and down, the rear cover 19B follows the field surface to form the surface of the ridge UN. Therefore, the furrow cutting member Z, which is attached to the rear cover 19B and can swing together with the rear cover 19B, can form a furrow at a constant depth from the field surface. Therefore, as shown in FIG. 12, the depth of the furrow cut by the furrow cutting member Z remains a constant depth from the surface of the ridge UN even if the tilling depth varies.

As shown in FIG. 5, the work machine 1 is equipped with a mulch film laying device 300 that lays a mulch film 300F on the ridges UN. The mulch film laying device 300 has a film pressing roller C that presses down the widthwise ends of the laid mulch film 300F. The film pressing roller C rolls along the grooves cut by the groove cutting member Z to bend the ends.

As shown in FIG. 5, the mulch film laying device 300 has a mulch film laying section 300B on which a mulch film roll 300R is attached, a film pressing roller C that presses down the ends of the film 300F, and a soil gathering member D that covers the film 300F with soil.
The mulch film laying section 300B has a roll support shaft 300J. A mulch film roll 300R is supported on the roll support shaft 300J. As shown in Fig. 6, the roll support shaft 300J includes a first roll support shaft 301 and a second roll support shaft 302. The mulch film roll 300R includes a first film roll 303 and a second film roll 304. A mulch film 300F pulled out from the mulch film roll 300R is placed over the ridges UN (see Fig. 12).

As shown in FIG. 5, the mulch film laying section 300B, the film pressing roller C, and the soil gathering member D are provided on a mounting structure E.
As shown in Figures 6 and 7, the mounting structure E includes a left mounting structure EL, a middle mounting structure EM, and a right mounting structure ER.
The left mounting structure EL is provided on a mounting body 196 provided on the left side of the rotary machine frame 11 (see Figures 7, 8, and 9). The intermediate mounting structure EM is provided on a central mounting body 196M (see Figures 7, 10, and 11). The right mounting structure ER is attached to a mounting body 196 provided on the right side of the rotary machine frame 11 (see Figure 7).

The left and right mounting bodies 196 are disposed on both the left and right sides of the rotary tiller 2. The front portions of the left and right mounting bodies 196 are attached to the left and right side frames 15L, 15R of the rotary machine frame 11. The central mounting body 196M is fixed to a mounting portion 13R1 of the rear support frame 13R of the rotary machine frame 11 (see FIGS. 4 and 5).
6 and 7, the film pressure rollers C of the mulch film laying device 300 include a left film pressure roller 331, a center left film pressure roller 332, a center right film pressure roller 333, and a right film pressure roller 334. These film pressure rollers C are composed of wheels, for example. These pressure rollers C may be called "first pressure rollers" to distinguish them from the high ridge pressure rollers described below.

The left film pressure roller 331 is supported by the left mounting structure EL on the left side, the centre left film pressure roller 332 and the centre right film pressure roller 333 are supported by the intermediate mounting structure EM, and the right film pressure roller 334 is supported by the right mounting structure ER on the right side.
As shown in FIG. 12, each film pressing roller C is attached to a mounting structure E such that its position in the machine width direction can be adjusted so that it is positioned within a groove MZ formed by a groove cutting member Z.

The left film holding roller 331 and the center left film holding roller 332 are provided at an incline so as to transition toward the first ridge UN1 as they proceed forward. The center right film holding roller 333 and the right film holding roller 334 are provided at an incline so as to transition toward the second ridge UN2 as they proceed forward.
The left film pressing roller 331 and the center left film pressing roller 332 are disposed behind the first film roll 303. The left film pressing roller 331 and the center left film pressing roller 332 press down both ends of the multi-film F1 laid on the first ridge UN1.

The center right film pressing roller 333 and the right film pressing roller 334 are disposed behind the second film roll 304. The center right film pressing roller 333 and the right film pressing roller 334 press down both ends of the mulch film F2 laid in the second ridge UN2.
6 and 7, the soil piling member D of the mulch-film laying device 300 has soil covering members DS, which include a left soil covering member 321, a center left soil covering member 322, a center right soil covering member 323, and a right soil covering member 324. The soil covering members DS are composed of circular soil covering disks. These soil covering members DS may be referred to as "first soil covering members" to distinguish them from soil covering members for high ridges, which will be described later.

The left soil cover member 321 is provided on the left mounting structure EL on the left side (see Figures 6 to 9). The center left soil cover member 322 and the center right soil cover member 323 are provided on the intermediate mounting structure EM (see Figures 6, 7, 10 and 11). The right soil cover member 324 is provided on the right mounting structure ER on the right side (see Figures 6 and 7).
12, the left soil covering member 321 and the center left soil covering member 322 are provided at an incline so that they approach each other toward the rear (moving toward the first ridge UN1). The center right soil covering member 323 and the right soil covering member 324 are provided at an incline so that they approach each other toward the rear (moving toward the second ridge UN2).

The left soil covering member 321 is disposed behind the left portion of the first film roll 303. The left soil covering member 321 covers the left end portion of the mulch film 300F1 that has been unwound from the first film roll 303 and laid on the first ridge UN1 with soil TU. The middle left soil covering member 322 is disposed behind the right portion of the first film roll 303. The middle left soil covering member 322 covers the right end portion of the mulch film 300F1 that has been unwound from the first film roll 303 and laid on the first ridge UN1 with soil TU.

The center right soil covering member 323 is disposed behind the left portion of the second film roll 304. The center right soil covering member 323 covers the left end portion of the mulch film 300F2 that has been unwound from the second film roll 304 and laid in the second ridge UN2 with soil TU. The right soil covering member 324 is disposed behind the right portion of the second film roll 304. The right soil covering member 324 covers the right end portion of the mulch film 300F2 that has been unwound from the second film roll 304 and laid in the second ridge UN2 with soil TU.

As explained above, the mulch film laying device 300 has a film pressing roller C that presses down the widthwise ends of the laid mulch film 300F, and the film pressing roller C rolls along the groove MZ cut by the groove cutting member Z to bend the widthwise ends of the mulch film 300F. Therefore, the ends of the mulch film 300F laid on the ridges UN are folded by the film pressing roller C and positioned within the groove MZ.

In addition, the mulch film laying device 300 has a soil covering member DS that covers the ends of the mulch film F folded by the film pressing roller C with soil, so that the ends of the mulch film F are held down by the soil covered by the soil covering member DS. Therefore, the mulch film F will not peel off due to wind, etc.
As shown in Figures 6 and 7, the soil gathering member D of the mulch film laying device 300 has blades BL. The blades BL include a first blade BL1, a second blade BL2, a third blade BL3, and a fourth blade BL4. Each of the blades BL1 to BL4 is composed of a flat plate-like body. The lower edge of the blade BL is formed in a straight line. The lower edge of the blade BL is disposed parallel to the ground. This makes it possible to level the soil by moving the blade BL.

The first blade BL1 is provided on the left mounting structure EL on the left side (see Figures 8 and 9), the second blade BL2 and the third blade BL3 are provided on the intermediate mounting structure EM (see Figures 10 and 11), and the fourth blade BL4 is provided on the right mounting structure ER on the right side.
As shown in Fig. 12, the blades BL1 to BL4 are disposed behind the soil covering members 321 to 324 and guide the soil that has been covered on the ends of the mulch film F by the soil covering members 321 to 324 onto the mulch film F that covers the upper surface of the ridges UN. In Fig. 12, the arrow YT indicates the direction in which the soil moves.

As shown in Figures 4, 7 and 9, the working machine 1 is equipped with a planting device 39 that plants seedlings in the ridges UN on which the mulch film 300F is laid, an irrigation tube KY1 that supplies water to the seedlings planted by the planting device 39, and an irrigation tube guide KY that supports the irrigation tube KY1. The irrigation tube guide KY is attached to the mounting frame X. As shown in Figure 4, a pair of irrigation tube guides KY are provided on the left and right sides of the mounting frame X of the rear cover 19B. The position of the irrigation tube guide KY in the machine width direction can be adjusted along the mounting frame X.

7 and 9, an irrigation tube KY1 is supported by the irrigation tube guide KY. The irrigation tube KY1 delivers water from a water tank (not shown) mounted on the traveling body 1A or the like to the vicinity of the planting tool 64 of the planting device 39 of the transplanter 3 via an irrigation pump (not shown). The end of the irrigation tube KY1 is located near the planting tool 64.
This allows water to be stably supplied to the seedlings from the irrigation tubes KY1. In other words, since the mounting frame X is provided on the rear cover 19B that follows the surface of the field, the irrigation tube guides KY provided on the mounting frame X also follow the surface of the field, and the irrigation tubes KY1 supported by the irrigation tube guides KY have good ability to follow the surface of the field, so that water is stably supplied to the seedlings planted in the field.

<Explanation of the combined flat and high ridge structure>
The working machine 1 shown in Figures 1 to 12 cuts furrows in a farm field to form flat ridges UN. The working machine 1 shown in Figures 13 to 19 stands ridges in a farm field to form high ridges UNH. The working machine 1 according to one embodiment of the present invention is designed to be used for both flat ridges UN and high ridges UNH. Hereinafter, flat ridges UN and high ridges UNH may be collectively referred to as ridge UN.

<Structure for flat ridges>
1 to 12 comprises a tilling section 18 that rotates about an axis 16 extending in the width direction of the machine to till the field, a ridge forming device A that forms ridges UN in the field tilled by the tilling section 18, a mulch film laying section 300B that lays a mulch film 300F on the ridges UN, and a soil piling member D that piles soil on the mulch film F. In the case of the flat ridge working machine 1, the ridge forming device A is a furrow cutting member Z that cuts furrows in the field to form the flat ridges UN.

The soil gathering member D has a soil covering member DS that covers the ends of the mulch film 300F with soil, and a blade BL that is positioned inward in the machine width direction from the soil covering member DS and guides the soil covering the ends onto the mulch film 300F that covers the top surface of the ridges UN. The blade BL is positioned at an angle to the soil covering member DS in a plan view and extends toward the inside in the machine width direction K2. The blade BL is configured separately from the soil covering member DS.

The mulch film laying unit 300B lays a mulch film 300F on the ridges UN. The soil gathering member D has a soil covering member DS and a blade BL. The soil covering member DS covers the ends of the mulch film 300F with soil. The blade BL guides the soil covered on the ends onto the mulch film F that covers the top surface of the ridges UN.
As shown in FIGS. 6 and 7 , the mulch-film laying section 300B has a roll support shaft 300J, and the roll support shaft 300J includes a first roll support shaft 301 and a second roll support shaft 302.

The first roll support shaft 301 supports the first film roll 303 around which the mulch film 300F1 to be laid on the first ridge UN1 is wound. The second roll support shaft 302 supports the second film roll 304 around which the mulch film 300F2 to be laid on the second ridge UN2 is wound. That is, the mulch film roll 300R supported by the roll support shaft 300J includes the first film roll 303 and the second film roll 304.

The first roll support shaft 301 and the second roll support shaft 302 extend in the width direction (machine width direction K2) of the tractor 1A. The axial centers of the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be aligned in the width direction (machine width direction K2) of the tractor 1A. The end of the first roll support shaft 301 on the inner side of the machine width and the end of the second roll support shaft 302 on the inner side of the machine width are supported by the intermediate mounting structure EM (see Figures 10 and 11). The left end (end on the outer side of the machine width) of the first roll support shaft 301 is supported by the left mounting structure EL on the left side (see Figures 8 and 9).

As shown in Figures 8, 9 and 12, the soil piling member D that piles soil onto the mulch film 300F has a left soil covering member 321, which is a soil covering member DS that covers the end of the mulch film 300F with soil, and a first blade BL1, which is a blade BL that guides soil onto the mulch film 300F.
The blade BL1 is disposed at an incline relative to the soil covering member 321 in plan view and extends inward in the machine width direction. The inner end of the soil covering member 321 in the machine width direction K2 and the outer end of the blade BL1 in the machine width direction coincide or overlap in the machine width direction. The soil covering member 321 is disposed at an incline in plan view so as to move inward in the machine width direction K2 as it moves rearward. The soil covering member 321 is attached to the mounting structure E via an angle adjustment mechanism EL8 that can adjust the angle of inclination of the soil covering member 321.

In this embodiment, the blade BL1 is configured separately from the soil covering member 321, but the blade BL1 may be configured integrally with the soil covering member 321.
The central portion shown in FIGS. 10 and 11 and the portion on the right side (not shown) are substantially the same as the portion on the left side in FIGS. 8 and 9, and therefore description thereof will be omitted.
<Structure for high ridges>
The working machine 1 shown in Figures 13 to 19 is for forming high ridges by erecting ridges in a farm field. That is, the working machine 1 shown in Figures 13 to 19 is a working machine for forming high ridges.

The working machine 1 comprises a tilling section 18 which rotates around an axis extending in the width direction of the machine to till the field, a ridge forming device A which forms ridges UN in the field tilled by the tilling section 18, a mulch film laying section 300B which lays a mulch film 300F on the high ridges UNH, and a soil piling member D which piles soil on the mulch film 300F.
The soil gathering member D has a soil covering member DS that covers the end portion of the mulch film 300F with soil.

The ridge forming device A has a ridge erector 51 that erects ridges in a field to form high ridges. In the case of a work machine 1 for high ridges, the ridge forming device A is a ridge erector 51 that erects ridges in a field (forms high ridges UNH).
13 and 14, the ridger 51 is, for example, a ridger. The ridger 51 has a shape whose width (length in the machine width direction) increases from the front to the rear in a plan view.

As shown in FIG. 19, the ridge builders 51 include a first ridge builder 51M in the center, a second ridge builder 51L on the left, and a third ridge builder 51R on the right. Therefore, two ridges UNH1 and UNH2 can be formed by forming furrows with the three ridge builders in the soil tilled by the rotary tiller 2. The upper surface of the high ridge UNH is formed by the rear cover 19B. Note that four or more ridge builders 51 may be provided to form three or more ridges.

The second ridge creator 51L is disposed on one side (left side) in the width direction of the rotary tiller 2. The third ridge creator 51R is disposed on the other side (right side) in the width direction of the rotary tiller 2. The first ridge creator 51M is disposed in the center of the rotary tiller 2 in the width direction.
The second ridge creator 51L forms the left side surface of the left ridge UNH1 of the two ridges UNH1, UNH2. The third ridge creator 51R forms the right side surface of the right ridge UNH2 of the two ridges UNH1, UNH2. The first ridge creator 51M forms the right side surface of the left ridge UNH1 and the left side surface of the right ridge UNH2.

The second ridge creator 51L is provided on the left mounting structure EL, the third ridge creator 51R is provided on the right mounting structure ER, and the first ridge creator 51M is provided on the intermediate mounting structure EM.
As shown in Figures 13, 14 and 19, the mulch film laying section 300B has a roll support shaft 300J. A mulch film roll 300R is supported on the roll support shaft 300J. The roll support shaft 300J includes a first roll support shaft 301 and a second roll support shaft 302. The mulch film roll 300R includes a first film roll 303 supported on the first roll support shaft 301 and a second film roll 304 supported on the second roll support shaft 302. A mulch film 300F pulled out from the mulch film roll 300R is placed over the high ridge UNH.

The first roll support shaft 301 and the second roll support shaft 302 extend in the width direction (machine width direction K2) of the tractor 1A. As shown in FIG. 19, the first roll support shaft 301 and the second roll support shaft 302 overlap in the width direction (machine width direction K2) of the tractor 1A. In other words, the portion 301a on the inner side of the machine width of the first roll support shaft 301 overlaps with the portion 302a on the inner side of the machine width of the second roll support shaft 302 in the machine width direction K2.

The right end (the end on the inner side of the machine width) of the first roll support shaft 301 is located to the right of the center in the machine width direction K2 of the mulch-film laying device 300. In addition, the right end of the first roll support shaft 301 is located to the right of the left end of the second roll support shaft 302 and the left end of the second film roll 304.
The left end (the end on the inner side of the machine width) of the second roll support shaft 302 is located to the left of the center in the machine width direction K2 of the mulch-film laying device 300. In addition, the left end of the second roll support shaft 302 is located to the left of the right end of the first roll support shaft 301 and the right end of the first film roll 303.

As shown in FIG. 14, the first roll support shaft 301 and the second roll support shaft 302 are arranged with a shift in the front-rear direction K1. As a result, the first film roll 303 and the second film roll 304 are arranged with a shift in the front-rear direction K1. In the case of this embodiment, the first roll support shaft 301 is arranged in front of the second roll support shaft 302. However, the first roll support shaft 301 may be arranged behind the second roll support shaft 302. Although not shown, the first roll support shaft 301 and the second roll support shaft 302 may also be arranged with a shift in the up-down direction.

The left end of the first roll support shaft 301 is supported by the left mounting structure EL. The right end of the first roll support shaft 301 is supported by the intermediate mounting structure EM. The left end of the second roll support shaft 302 is supported by the intermediate mounting structure EM. The right end of the second roll support shaft 302 is supported by the right mounting structure ER.
13 and 14, the film pressing rollers C of the mulch film laying device 300 include a high ridge left film pressing roller 331H, a high ridge middle left film pressing roller 332H, a high ridge middle right film pressing roller 333H, and a high ridge right film pressing roller 334H. These film pressing rollers C are composed of wheels, for example.

The high ridge left film pressing roller 331H is supported by the left mounting structure EL. The high ridge middle left film pressing roller 332H and the high ridge middle right film pressing roller 333H are supported by the intermediate mounting structure EM. The high ridge right film pressing roller 334H is supported by the right mounting structure ER.
The high ridge pressure roller C may be referred to as a "second pressure roller" to distinguish it from the "first pressure roller" for the flat ridges.

As shown in FIG. 19, each film pressing roller C is attached to a mounting structure E so that its position can be adjusted in the machine width direction so that it is positioned within a groove MZ formed by a ridge forming tool 51.
The high ridge left film holding roller 331H and the high ridge middle left film holding roller 332H are provided at an incline so as to approach each other (shifting toward the first ridge UNH1) as they go forward. The high ridge middle right film holding roller 333H and the high ridge right film holding roller 334H are provided at an incline so as to approach each other (shifting toward the second ridge UNH2) as they go forward.

The high ridge left film holding roller 331H and the high ridge middle left film holding roller 332H are disposed behind the first film roll 303. The high ridge left film holding roller 331H and the high ridge middle left film holding roller 332H hold down both ends of the mulch film 300F1 laid on the first ridge UNH1.
The high ridge middle right film holding roller 333H and the high ridge right film holding roller 334H are disposed behind the second film roll 304. The high ridge middle right film holding roller 333H and the high ridge right film holding roller 334H hold down both ends of the mulch film 300F2 laid on the second ridge UNH2.

The high ridge middle left film holding roller 332H and the high ridge middle right film holding roller 333H are arranged offset in the front-to-back direction K1. In this embodiment, the high ridge middle left film holding roller 332H is arranged in front of the high ridge middle right film holding roller 333H. However, it is sufficient that either the high ridge middle left film holding roller 332H or the high ridge middle right film holding roller 333H is arranged behind the other film holding roller. Which of the high ridge middle left film holding roller 332H and the high ridge middle right film holding roller 333H is arranged behind can be determined by the front-to-back relationship between the first roll support shaft 301 and the second roll support shaft 302.

19, the soil piling member D has soil covering members DS. The soil covering members DS include a high ridge left soil covering member 321H, a high ridge middle left soil covering member 322H, a high ridge middle right soil covering member 323H, and a high ridge right soil covering member 324H. The soil covering members DS are composed of a circular soil covering disk.
In addition, these high ridge soil covering members DS may be referred to as "second soil covering members" to distinguish them from the "first soil covering members" for the flat ridges.

The high ridge left soil covering member 321H and the high ridge middle left soil covering member 322H are provided at an incline so that they approach each other toward the rear (moving toward the first ridge UNH1 side). The high ridge middle right soil covering member 323H and the high ridge right soil covering member 324H are provided at an incline so that they approach each other toward the rear (moving toward the second ridge UNH2 side).
The high ridge left soil covering member 321H is disposed behind the left part of the first film roll 303. The high ridge left soil covering member 321H covers with soil the left end part of the mulch film 300F1 that has been unwound from the first film roll 303 and laid on the first ridge UNH1. The high ridge middle left soil covering member 322H is disposed behind the right part of the first film roll 303. The high ridge middle left soil covering member 322H covers with soil the right end part of the first ridge UNH1 of the mulch film 300F1 that has been unwound from the first film roll 303 and laid on the first ridge UNH1.

The high ridge middle right soil covering member 323H is positioned behind the left part of the second film roll 304. The high ridge middle right soil covering member 323H covers with soil the left end part of the mulch film 300F2 that has been unwound from the second film roll 304 and laid on the second ridge UNH2. The high ridge right soil covering member 324H is positioned behind the right part of the second film roll 304. The high ridge right soil covering member 324H covers with soil the right end part of the mulch film 300F2 that has been unwound from the second film roll 304 and laid on the second ridge UNH2.

The high ridge middle left soil covering member 322H and the high ridge middle right soil covering member 323H are arranged offset in the front-to-rear direction K1. In this embodiment, the high ridge middle left soil covering member 322H is arranged in front of the high ridge middle right soil covering member 323H. However, it is sufficient that either the high ridge middle left soil covering member 322H or the high ridge middle right soil covering member 323H is arranged behind the other soil covering member. Which of the high ridge middle left soil covering member 322H and the high ridge middle right soil covering member 323H is arranged behind can be determined by the front-to-rear relationship between the first roll support shaft 301 and the second roll support shaft 302. Specifically, when the second roll support shaft 302 is positioned behind the first roll support shaft 301, the high ridge middle right soil covering member 323H is positioned behind the high ridge middle left soil covering member 322H. When the first roll support shaft 301 is positioned behind the second roll support shaft 302, the high ridge middle left soil covering member 322H is positioned behind the high ridge middle right soil covering member 323H.

The high ridge middle left soil covering member 322H and the high ridge middle right soil covering member 323H are arranged to overlap in the width direction (machine width direction K2) of the tractor 1A (see FIG. 18). The high ridge middle left soil covering member 322H and the high ridge middle right soil covering member 323H also overlap in the front-rear direction K1.
In FIG. 19, the direction in which the soil moves is indicated by an arrow YT.

As shown in Fig. 15, the left high ridge soil covering member 321H is attached to the left mounting structure EL. As shown in Fig. 17, the middle left high ridge soil covering member 322H and the middle right high ridge soil covering member 323H are attached to the intermediate mounting structure EM. As shown in Fig. 14, the right high ridge soil covering member 324H is attached to the right mounting structure ER.
A working machine 1 according to one embodiment of the present invention can function as both a flat ridge working machine as shown in FIG. 12 etc. and a high ridge working machine as shown in FIG. 19 etc.

That is, the ridge forming device A of the working machine 1 includes a furrow cutting member Z that cuts furrows in the field to form flat ridges UN, and a ridge erector 51 that erects ridges in the field to form high ridges UNH. The working machine 1 is provided with a mounting structure E to which a flat ridge member used together with the furrow cutting member Z and a high ridge member used together with the ridge erector 51 can be selectively attached.
20 to 22 show a "mounting structure E" for use in both flat ridges and high ridges with a single work machine 1. This "mounting structure E" includes a "left mounting structure EL", a "middle mounting structure EM", and a "right mounting structure ER".

By attaching a "flat ridge member" to this mounting structure E and using a furrow cutting member Z, a flat ridge working machine 1 for forming flat ridges UN is constructed (see Figure 12, etc.). Also, by attaching a "high ridge member" to the mounting structure E instead of the flat ridge member and using a ridge erector 51 instead of the furrow cutting member Z, a high ridge working machine 1 for forming high ridges UNH is constructed (see Figure 19, etc.).

As shown in Figure 12 etc., the "flat ridge members" include "first soil covering members" which are soil covering members DS that cover the widthwise ends of the mulch film 300F laid on the flat ridge UN with soil. The "first soil covering members" include a left soil covering member 321, a center left soil covering member 322, a center right soil covering member 323, and a right soil covering member 324.
The "flat ridge member" includes a "first film holding roller" which is a film holding roller C that holds down the widthwise end of the mulch film 300F laid on the flat ridge UN. The "first film holding roller" includes a left film holding roller 331, a center left film holding roller 332, a center right film holding roller 333, and a right film holding roller 334.

The "flat ridge member" includes a blade BL. The blade BL guides the soil covered on the ends by the soil covering member DS onto the mulch film 300F that covers the upper surface of the ridge UN. The blade BL is disposed at an angle to the soil covering member DS in a plan view and extends toward the inside in the machine width direction K2. The blade BL is configured as a separate body or integral with the soil covering member DS.
19 and other figures, the "high ridge members" include "second soil covering members" which are soil covering members DS that cover the widthwise ends of the mulch film 300F laid on the high ridge UNH with soil. The "second soil covering members" include a high ridge left soil covering member 321H, a high ridge middle left soil covering member 322H, a high ridge middle right soil covering member 323H, and a high ridge right soil covering member 324H.

The "high ridge member" includes a "second film holding roller" which is a film holding roller C that holds down the widthwise end of the mulch film 300F laid on the high ridge UNH. The "second film holding roller" includes a high ridge left film holding roller 331H, a high ridge middle left film holding roller 332H, a high ridge middle right film holding roller 333H, and a high ridge right film holding roller 334H.

As shown in Figures 20 and 21, the "left mounting structure EL" which is the mounting structure E has a base EL1 which is fixed to the mounting body 196 of the rotary machine frame 11. The base EL1 is formed in a T-shape with a horizontal portion EL1H which is attached to the mounting body 196 and a vertical portion EL1V which hangs down from the center of the horizontal portion EL1H. A ridger 51 (51L) can be attached to the vertical portion EL1V (see Figure 13).

An attachment arm EL2 protrudes rearward from the vertical section EL1V. The attachment arm EL2 is attached to a bracket EL1a provided on the vertical section EL1V via a pivot shaft EL1b so that it can swing up and down. The vertical section EL1V and the attachment arm EL2 are connected by a tension spring EL3, and the attachment arm EL2 is biased downward. An attachment block EL4 and an attachment plate EL5 are attached to the tip of the attachment arm EL2. A chain attachment section EL6 is provided on the upper surface of the attachment block EL4. A multi-film roll support section EL7 protrudes outward in the machine width direction from the vertical section EL1V.

The mounting plate EL5 has a first mounting portion EL21 to which the first soil covering member "left soil covering member 321" can be attached. The mounting block EL4 has a second mounting portion EL22 to which the second soil covering member "high ridge left soil covering member 321H" can be attached. The base side of the mounting arm EL2 has a third mounting portion EL23 to which the first film holding roller "left film holding roller 331" can be attached. The mounting plate EL5 has a fourth mounting portion EL24 to which the second film holding roller "high ridge left film holding roller 331H" can be attached. The mounting block EL4 has a fifth mounting portion EL25 to which the blade BL "first blade BL1" can be attached.

As shown in Figures 8 and 9, a "left soil covering member 321" which is a first soil covering member is attached to the "first mounting portion EL21" via an angle adjustment mechanism EL8.
The angle adjustment mechanism EL8 has an arm EL8b that is attached to the mounting plate EL5 via a support shaft EL8a so as to be rotatable in a horizontal plane. A long hole EL8c is formed in the arm EL8b with the support shaft EL8a at its center, and the rotation angle of the arm EL8b can be adjusted by loosening a bolt EL8d inserted into the long hole EL8c. A left soil cover member 321 is attached to the tip of the arm EL8b.

As shown in Figures 15 and 16, a second soil covering member, the "left soil covering member 321H", is attached to the "second mounting portion EL22" via a second soil covering member mounting arm EL4a.
That is, the base of the second soil cover member mounting arm EL4a is fixed to the mounting block EL4, a plate portion EL4b is provided at the tip of the second soil cover member mounting arm EL4a, and the left soil cover member 321H is attached to the plate portion EL4b via an angle adjustment mechanism EL8. This angle adjustment mechanism EL8 is the same as that shown in Figure 8, so a description thereof will be omitted.

As shown in Figures 8 and 9, a "left film pressing roller 331" which is the first film pressing roller is attached to the "third mounting portion EL23" via a roller mounting bar EL9.
That is, a roller mounting bar EL9 is attached to the third mounting portion EL23 so as to protrude inward in the machine width direction, and a slider EL9a is attached to the roller mounting bar EL9 so as to be movable in the machine width direction. An L-shaped roller mounting arm EL9b is attached to the slider EL9a so as to be able to swing up and down, and a left film pressure roller 331 is attached to the lower end of the roller mounting arm EL9b. A tension spring EL9c is provided between the roller mounting arm EL9b and the slider EL9a, and the left film pressure roller 331 is biased in the direction toward the ground. The slider EL9a is fixed to the roller mounting bar EL9 by a lock bolt EL9d, and its position in the machine width direction can be adjusted.

As shown in Figures 15 and 16, the second film pressing roller, "left film pressing roller 331H", is attached to the "fourth mounting portion EL24" via a roller mounting bar EL9.
That is, a roller mounting bar EL9 is attached to the fourth mounting portion EL24 so as to protrude inward in the machine width direction, and a slider EL9a is provided on the roller mounting bar EL9 so as to be movable in the machine width direction. The other configuration is the same as that in FIG.

As shown in Figs. 8 and 9, a "first blade BL1" which is a blade BL, is attached to the "fifth attachment portion EL25" via a blade attachment arm EL4c.
That is, the base of an L-shaped blade mounting arm EL4c is fixed to the mounting block EL4. An attachment part EL4d is provided at the tip of the blade mounting arm EL4c, and a plate-shaped first blade BL1 is fixed to the attachment part EL4d with a mounting bolt EL4e. An earth retaining plate PL is provided on the upper part of the first blade BL1, on the left soil covering member 321 side of the blade mounting arm EL4c, to prevent soil from going over the first blade BL1. Similarly, an earth retaining plate PL is provided on the upper part of the fourth blade BL4, on the right soil covering member 324 side of the blade mounting arm, to prevent soil from going over the fourth blade BL4.

The "right mounting structure ER", which is the mounting structure E, has a bilaterally symmetrical structure to the "left mounting structure EL", so a description thereof will be omitted.
FIG. 22 is a perspective view of the “intermediate mounting structure EM” which is the mounting structure E.
The intermediate mounting structure EM has a vertical part EM1. The vertical part EM1 is attached to a central mounting body 196M (see Figures 7, 10, 11, 14, 17, and 18). A ridge builder 51 (51M) can be attached to the vertical part EM1 (see Figure 18). A mounting arm EM2 is provided on the vertical part EM1 so as to protrude rearward.

The mounting arm EM2 is composed of a pair of upper and lower parallel links. The base side of the parallel links is attached to a bracket EM1a provided on the vertical section EM1 via a pivot shaft EM1b so that it can swing up and down. A bracket EM3 is provided at the tip of the parallel links, and the pair of upper and lower parallel links are connected via a pivot shaft EM3a provided on the bracket EM3. A tension spring EM4 is interposed between the pair of upper and lower parallel links. A chain mounting part EM5 is provided on the top surface of the tip of the upper parallel link. A multi-film roll support part EM6 is provided at the bottom of the vertical section EM1 and protrudes toward both sides in the machine width direction.

A first mounting portion EM21, a second mounting portion EM22, a fourth mounting portion EM24, and a fifth mounting portion EM25 are provided on the underside of the bracket EM3, and a third mounting portion EM23 is provided on the upper surface of the base side of the lower parallel link.
As shown in Figures 10 and 11, a center left soil covering member 322 and a center right soil covering member 323, which are first soil covering members, are attached to the "first mounting portion EM21".

That is, a first mounting plate EM7 is attached to the underside of the bracket EM3, a center left soil covering member 322 is provided on the left side of the first mounting plate EM7, and a center right soil covering member 323 is provided on the right side.
As shown in Figures 17 and 18, the second soil covering members, a middle left soil covering member for high ridges 322H and a middle right soil covering member for high ridges 323H, are attached to the "second mounting portion EM22" via a second mounting plate EM8.

That is, a plate-shaped second mounting plate EM8 is attached to the underside of the bracket EM3, a stay EM8a hangs down from the rear end of the second mounting plate EM8, a high ridge middle left soil covering member 322H is provided on the left side of the lower part of the stay EM8a, and a high ridge middle right soil covering member 323H is provided on the right side of that (see FIG. 18). The high ridge middle left soil covering member 322H is positioned forward of the high ridge middle right soil covering member 323H in a plan view.

As shown in Figures 10 and 11, the first film pressing rollers, that is, the center left film pressing roller 332 and the center right film pressing roller 333, are attached to the "third mounting portion EM23" via a roller mounting bar EM9.
That is, the roller mounting bar EM9 is attached to the third mounting portion EM23 so as to protrude in both directions in the machine width direction. A slider EM9a is attached to each of the roller mounting bars EM9 on both sides so as to be movable in the machine width direction. An L-shaped roller mounting arm EM9b is attached to each slider EM9a so as to be swingable up and down, and a center left film pressure roller 332 is attached to the lower end of the left roller mounting arm EM9b, and a center right film pressure roller 333 is attached to the right roller mounting arm EM9b. A tension spring EM9c is provided between the roller mounting arm EM9b and the slider EM9a, and each roller 332, 333 is biased in the direction of contact with the ground. The slider EM9a is fixed to the roller mounting bar EM9 by a lock bolt EM9d, and its position in the machine width direction can be adjusted by loosening the lock bolt EM9d.

17 and 18, the second film hold-down rollers, the high ridge middle left film hold-down roller 332H and the high ridge middle right film hold-down roller 333H, are attached via a roller mounting bar EM9 to the "fourth mounting portion EM24." The roller mounting bar EM9 is provided on the second mounting plate EM8 so as to protrude on both sides in the machine width direction.
That is, the roller mounting bar EM9 is provided so as to protrude in the left-right direction from the lower surface of the tip side of the plate-shaped second mounting plate EM8 attached to the underside of the bracket EM3. The left roller mounting bar EM9 is located further forward than the right roller mounting bar EM9 in a plan view.

A slider EM9a is provided on each roller mounting bar EM9 so that it can move freely in the machine width direction. An L-shaped roller mounting arm EM9b is provided on each slider EM9a so that it can swing up and down, and a high ridge middle left film pressing roller 332H is attached to the lower end of the left roller mounting arm EM9b, and a high ridge middle right film pressing roller 333H is attached to the right roller mounting arm EM9b. A tension spring EM9c is provided between the roller mounting arm EM9b and the slider EM9a, and each roller 332H, 333H is biased in the direction of contact with the ground. The slider EM9a is fixed to the roller mounting bar EM9 by a lock bolt EM9d, and the position in the machine width direction can be adjusted by loosening the lock bolt EM9d.

As shown in Figs. 10 and 11, a second blade BL2 and a third blade BL3, which are blades BL, are attached to the fifth attachment portion EM25 via a blade attachment member EM10.
That is, a blade attachment member EM10 is provided on a first attachment plate EM7 attached to the underside of a bracket EM3. The blade attachment member EM10 has a vertical portion EM10a and a horizontal portion EM10b provided at the lower end of the vertical portion. The horizontal portion EM10b extends in the machine width direction. The second blade BL2 and the third blade BL3 are fixed to the horizontal portion EM10b by bolts EM10c.

The second blade BL2 is positioned behind the center left soil covering member 322. The inboard side (left side) of the second blade BL2 overlaps with the center left soil covering member 322 in the width direction. The third blade BL3 is positioned behind the center right soil covering member 323. The inboard side (right side) of the third blade BL3 overlaps with the center right soil covering member 323 in the width direction.

The second blade BL2 and the third blade BL3 are arranged on the same straight line extending in the aircraft width direction, but may be arranged so as to incline rearward as they move from the aircraft width inner side to the aircraft width outer side.
In the working machine 1 according to one embodiment of the present invention described above, the ridge forming device A includes a furrow cutting member Z that cuts furrows in the field to form flat ridges UN, and a ridge erector 51 that erects ridges in the field to form high ridges UNH. The device is also provided with a mounting structure E to which a flat ridge member used together with the furrow cutting member Z and a high ridge member used together with the ridge erector 51 can be selectively attached, so that a single working machine can be used for both flat ridges and high ridges.

<Arrangement of blades for flat ridges>
As shown in FIG. 12, the work machine 1 according to one embodiment of the present invention has a structure in which a mulch film 300F is covered with soil to prevent the mulch film 300F from being peeled off by wind or the like.
The working machine 1 shown in Figures 5 to 12 comprises a ridge forming device A that forms ridges UN in a field, a mulch film laying device 300 that lays a mulch film 300F on the ridges UN, and a planting device 39 that plants seedlings in the ridges UN on which the mulch film 300F has been laid.

The mulch film laying device 300 has a soil covering member DS that covers the ends of the mulch film 300F with soil, and a blade BL that is positioned forward of the planting device 39 and guides the soil that has been covered on the ends by the soil covering member DS onto the mulch film 300F that covers the upper surface of the ridges UN.
As shown in Figure 7, the blades BL (BL1 to BL4) are positioned forward of the planting device 39, so that before the planting device 39 plants the seedlings NE in the ridges UN, soil is placed on top of the mulch film 300F and the soil is leveled by the blades BL. Holes for planting are made in the mulch film 300F by the planting device 39, but when the wind blows, the wind enters through the holes and there is a risk that the mulch film 300F will peel off from the top surface of the ridges UN. However, in this embodiment, soil is placed on top of the mulch film 300F before the planting holes are made, so there is no risk of the mulch film 300F peeling off due to wind.

The ridge forming device A shown in Figures 4 and 5 is a furrow cutting member Z that cuts furrows to form ridges UN in a field that has been tilled by the tilling unit 18. The furrow cutting member Z is attached to a rear cover 19B that moves up and down following the field surface, so that even if the tilling depth by the tilling unit 18 fluctuates, the depth of the furrows formed by the furrow cutting member Z will be constant from the surface of the ridges UN.
As shown in Fig. 12, the soil covering member DS is disposed behind the grooving member Z. The blade BL is disposed behind the soil covering member DS. With this configuration, the soil covering member DS can efficiently cover the end of the mulch film 300F located on the groove formed by the grooving member Z. In addition, the blade BL can guide the soil at the end onto the mulch film 300F covering the top surface of the ridge.

In the present invention, "rear" means "rear in terms of the positional relationship in the fore-and-aft direction," and also includes being shifted in the left-right direction. Furthermore, "rear" at least means being rearward when comparing the positions of the centers in the fore-and-aft direction. For example, the fore-and-aft center of the blade BL may be located rearward of the fore-and-aft center of the soil covering member DS. Furthermore, the front end of the soil covering member DS may be located forward of the front end of the blade BL.

In the above configuration, the soil covering member DS and the blade BL are formed separately, but as described above, the soil covering member DS and the blade BL may be formed integrally.
In addition, the left-right positional relationship between the soil covering member DS and the trench cutting member Z can be adjusted (changed) by changing the position of the trench cutting member Z and/or the mounting structure E in the machine width direction (left-right direction).
The positional relationship between the groove cutting member Z, the soil covering member DS and the blade BL will be explained in more detail.

As shown in Figures 10 to 12, the soil covering members DS attached to the intermediate mounting structure EM are a center left soil covering member 322 and a center right soil covering member 323, and the blades BL are a second blade BL2 and a third blade BL3.
On the left side of the intermediate mounting structure EM, a middle left film holding roller 332 is arranged behind the groove cutting member Z so as to be located within the groove MZ cut by the groove cutting member Z. A middle left soil covering member 322 is arranged behind the middle left film holding roller 332, and a second blade BL2 is arranged further behind it. The front end of the middle left soil covering member 322 is located inside the machine body relative to the groove MZ, and the rear end is located within the groove MZ. The right end of the second blade BL2 is in a position where it overlaps with the middle left soil covering member 322 in the machine width direction. The left end of the second blade BL2 reaches the planting position of the seedlings NE on the upper surface of the first ridge UN1.

The center left film pressing roller 332 folds and presses the end of the mulch film 300F1 laid on the first ridge UN1 so that it fits along the side of the first ridge UN1 formed by the groove cutting member Z. The center left soil covering member 322, located behind the center left film pressing roller 332, covers the end of the folded mulch film 300F1 with soil TU between the grooves and also covers the shoulder of the first ridge UN1. The second blade BL2, located behind the center left soil covering member 322, moves above the mulch film 300F1, guiding the soil covering the shoulder of the first ridge UN1 to the top surface of the first ridge UN1 and covering it on the top surface of the mulch film 300F1, as shown by the arrow YT in Figure 12.

The center right film holding roller 333, center right soil covering member 323, and third blade BL3, which are provided on the right side of the intermediate mounting structure EM, are arranged symmetrically with the center left film holding roller 332, center left soil covering member 322, and second blade BL2, across the center of the transplanter's width direction. Therefore, they have the same structure (positional relationship) and action (function) as the left film holding roller 332, center left soil covering member 322, and second blade BL2.

The left film pressing roller 331 attached to the left mounting structure EL shown in Figures 8 and 9 is positioned so as to be located within the groove MZ formed by the groove cutting member Z (see Figure 12). The left soil covering member 321 is positioned on the outer side (left side) of the machine body of the groove MZ. The outer end (left end) of the first blade BL1 is in a position that overlaps in the machine width direction with the inner end (right end) of the left soil covering member 321. The inner end (right end) of the first blade BL1 reaches the planting position of the seedlings NE on the top surface of the first ridge UN1.

The left film pressing roller 331 folds and presses the end of the mulch film 300F1 laid on the first ridge UN1 so that it fits along the side of the first ridge UN1 formed by the groove cutting member Z. The left soil covering member 321, located behind the left film pressing roller 331, covers the soil TU between the grooves over the end of the folded mulch film 300F1 and also over the shoulder of the first ridge UN1. The first blade BL1, located behind the left soil covering member 321, moves above the mulch film 300F1, guiding the soil covering the shoulder of the first ridge UN1 to the top surface of the first ridge UN1 and covering it over the top surface of the mulch film 300F1, as shown by the arrow YT in Figure 12.

The right film holding roller 334, right soil covering member 324, and fourth blade BL4 attached to the right mounting structure ER are arranged symmetrically with the left film holding roller 331, left soil covering member 321, and first blade BL1 across the center of the transplanter's width direction. Therefore, they have the same arrangement (positional relationship) and action (function) as the left film holding roller 331, left soil covering member 321, and first blade BL1.

<Multi-film mounting structure>
As shown in Figures 23 to 29, the work machine 1 has a structure that makes it easy to attach and detach the multi-film roll.
As shown in Figures 5, 6, 12 and 23, the multi-film laying device 300 has a roll support shaft 300J that is penetrated by the film roll 300R on which the multi-film 300F is wound and supports the film roll 300R over its entire length, one support part J1 that supports one end side of the roll support shaft 300J, and the other support part J2 that supports the other end side of the roll support shaft 300J.

23 and 24, one end of the roll support shaft 300J (outside the machine body) is detachable from the one support part J1, and the other end (inside the machine body) is swingable about the other support part J2. More specifically, the other end of the roll support shaft 300J is swingable in the up-down direction about the other support part J2.
12 and 23, the roll support shaft 300J includes a first roll support shaft 301 that supports the mulch film 300F1 attached to the first ridge UN1, and a second roll support shaft 302 that supports the mulch film 300F2 attached to the second ridge UN2 adjacent to the first ridge UN1. The first roll support shaft 301 and the second roll support shaft 302 can swing independently.

As shown in FIG. 23, the one-side support part J1 includes a first one-side support part J1a that supports one end side of the first roll support shaft 301 and a second one-side support part J1b that supports one end side of the second roll support shaft 302. The other-side support part J2 includes a first other-side support part J2a that supports the other end side of the first roll support shaft 301 and a second other-side support part J2b that supports the other end side of the second roll support shaft 302.

12, the first other-side support portion J2a supports the other end of the first roll support shaft 301 between the first ridge UN1 and the second ridge UN2. The second other-side support portion J2b supports the other end of the second roll support shaft 302 between the first ridge UN1 and the second ridge UN2.
As indicated by the arrow Y2 in Figures 25 and 26, the one support part J1 and the other support part J2 are movable parallel to the axial direction of the roll support shaft 300J.

27 to 29, the roll support shaft 300J is formed in a cylindrical shape. The other support part J2 has a support rod J3 that is inserted into the other end of the roll support shaft 300J to support the other end, a through shaft J3a that passes through the support rod J3, and a holding member J3b that holds the roll support shaft 300J rotatably around the through shaft J3a.
The other support part J2 is arranged movably along the roll support shaft 300J and has a locking member J4 that is movable between an allowable position that allows the roll support shaft 300J to rotate and a locked position that does not allow the roll support shaft 300J to rotate.

Let me explain in more detail.
As shown in Figures 24 and 26, the first one-side support part J1a supports one end side of the first roll support shaft 301. The first one-side support part J1a is provided on the left mounting structure EL. A multi-film roll support part EL7 is provided on a vertical part EL1V of the left mounting structure EL. The first one-side support part J1a is provided on the multi-film roll support part EL7.

The first one-side support portion J1a has a slider EL7a slidably mounted on the multi-film roll support portion EL7 and an arm EL7b mounted on the slider EL7a. The slider EL7a is fixed to the multi-film roll support portion EL7 by a lock bolt EL7c, and is positioned in the left-right direction.
An upwardly opening recess EL7d is provided at the tip of the arm EL7b to support one end of the first roll support shaft 301. A lid member EL7e is provided to prevent the first roll support shaft 301 from coming off upward from the recess EL7d. One end of the lid member EL7e is rotatably attached to the tip of the arm EL7b by a pivot EL7f. The other end of the lid member EL7e is rotatably fixed to the tip of the arm EL7b by a lock bolt EL7g.

By loosening the lock bolt EL7g and opening the lid member EL7e upward, it can be freely attached to and detached from the recess EL7d on one end side of the first roll support shaft 301 (see arrow Y3 in FIG. 26).
As shown in Figure 23, the second one-side support part J1b supports one end side of the second roll support shaft 302. The second one-side support part J1b is provided on the right mounting structure ER. The second one-side support part J1b is symmetrical to the first one-side support part J1a across the center CL1 of the transplanter in the machine width direction. The configuration of the second one-side support part J1b is the same as the configuration of the first one-side support part J1a.

As shown in Figures 24, 25, and 27 to 29, the first other-side support part J2a supports the other end side of the first roll support shaft 301. The first other-side support part J2a is provided on the intermediate mounting structure EM. A multi-film roll support part EM6 is provided on the vertical part EM1 of the intermediate mounting structure EM. The first other-side support part J2a is provided on the multi-film roll support part EM6.

The first other support portion J2a has a slider EM6a slidably mounted on the multi-film roll support portion EM6 and an arm EM6b attached to the slider EM6a. The slider EM6a is fixed to the multi-film roll support portion EM6 by a lock bolt EM6c, and is positioned in the left-right direction.
27 to 29, the first roll support shaft 301 is formed in a cylindrical shape. The first other support part J2a has a support rod J3 at the tip of an arm EM6b, a through shaft J3a penetrating the support rod J3, and a holding member J3b that holds the first roll support shaft 301 rotatably around the through shaft J3a.

That is, the support rod J3 has an axis extending in the machine width direction K2 and is fixed to the tip of the arm EM6b. The through shaft J3a has an axis extending in the front-rear direction K1 and penetrates the support rod J3 so that both ends thereof protrude from the support rod J3.
The front and rear ends of the through shaft J3a are inserted into holes formed in a cylindrical first roll support shaft 301, and support the first roll support shaft 301 on the support rod J3 so as to be rotatable up and down.

The holding member J3b is formed in a semicircular ring shape, one end of which is provided to be able to swing on one end of the through shaft J3a, and the other end of which is detachably engaged with the other end of the through shaft J3a. A ring groove J3c is formed on the outer circumferential surface of the first roll support shaft 301 to accommodate the holding member J3b and prevent it from protruding from the outer circumferential surface of the first roll support shaft 301.
The other end of the first roll support shaft 301 can be attached to and detached from the support rod J3 by releasing the engagement between the holding member J3b and the through shaft J3a and removing the through shaft J3a from the support rod J3. The other end of the first roll support shaft 301 can be attached to the support rod J3 by inserting the other end of the first roll support shaft 301 into the support rod J3, inserting the through shaft J3a between the first roll support shaft 301 and the support rod J3, and holding it with the holding member J3b. In the state where the other end of the first roll support shaft 301 is attached to the support rod J3, the first roll support shaft 301 can be rotated (inclined) in the vertical direction around the axis of the through shaft J3a (see the imaginary lines in Figures 23 and 24). This configuration makes it easy to attach and detach the multi-film roll 300R, which is a heavy object, to and from the film roll support shaft 300J.

As shown in Figures 25, 27, and 29, the first other support part J2a has a locking member J4. The locking member J4 is arranged to be movable along the first roll support shaft 301, and can be moved between an allowable position (see Figure 29(a)) that allows rotation of the first roll support shaft 301 around the through shaft J3a and a locked position (see Figure 29(b)) that does not allow rotation of the first roll support shaft 301 around the through shaft J3a.

The locking member J4 is formed as a cylindrical body that is slidably fitted onto the other end of the first roll support shaft 301. A locking bolt J4a is screwed into the locking member J4. An operating piece J4b is provided on the locking bolt J4a. By pinching the operating piece J4b and rotating the locking bolt J4a, the locking member J4 can be switched between a state in which it is fixed to the first roll support shaft 301 and a state in which it is movable along the first roll support shaft 301.

As shown in (a) of FIG. 29, by loosening the lock bolt J4a and placing the lock member J4 in a position where its end face is away from the arm EM6b, the first roll support shaft 301 can be tilted downward around the through axis J3a, as shown by the imaginary line.
As shown in (b) of FIG. 29, the locking member J4 is placed in a position where its end face comes into contact with the arm EM6b, and the locking bolt J4a is tightened to fix the locking member J4 to the first roll support shaft 301. As a result, the first roll support shaft 301 is prevented from tilting due to the contact between the end face of the locking member J4 and the arm EM6b.

The configuration of the second other support portion J2b that supports the other end side of the second roll support shaft 302 is the same as the configuration of the first other support portion J2a described above.
The high ridge working machine shown in Figures 13 to 19 also has the above-mentioned one support part J1 and the other support part J2.
<Structure of the ridger>
As shown in Figures 19 and 30 to 35, the work machine 1 according to one embodiment of the present invention has a structure that allows a sufficient amount of soil to be placed on the mulch film 300F.

As shown in Figures 13, 14 and 19, the working machine 1 includes a tilling section 18 that tills the field, a ridge builder 51 that erects and forms ridges UN in the field tilled by the tilling section 18, a mulch film laying section 300B that lays a mulch film 300F on the ridges UN formed by the ridge builder 51, and a soil piling member D that piles soil on the mulch film 300F laid by the mulch film laying section 300B.

As shown in Figures 14 and 19, the ridge erector 51 includes a first ridge erector 51M that forms the slope on one side of the first ridge UN1 and the slope on one side of the second ridge UN2 that are adjacent to each other across the first ridge UN1, a second ridge erector 51L that forms the slope on the other side of the first ridge UN1, and a third ridge erector 51R that forms the slope on the other side of the second ridge UN2.
13 to 16, the second ridge creator 51L is disposed on one side (left side) in the width direction of the rotary tiller 2. The second ridge creator 51L forms the left side of the left ridge of the two ridges.

The second ridge creator 51L has mounting portions 51La, 51Lb that are attached to the rotary tiller 2. The mounting portions 51La, 51Lb include a front mounting portion 51La provided at the front of the second ridge creator 51L and a rear mounting portion 51Lb provided at the rear of the second ridge creator 51L.
The front mounting portion 51La of the second ridge former 51L is provided at the front end of the second ridge former 51L and is attached to the first side cover 19CL via a front mounting body 52. The front portion of the front mounting body 52 is attached to the outer surface (the surface on the outer side of the machine width) of the first side cover 19CL. The front mounting body 52 is bent so as to move toward the outer side of the machine width as it moves toward the rear. The front mounting portion 51La of the second ridge former 51L is attached to the rear portion of the front mounting body 52. The vertical position of the front mounting portion 51La relative to the front mounting body 52 can be adjusted.

The rear mounting portion 51Lb of the second ridge builder 51L is attached to the left mounting structure EL via the side connector 53. The rear mounting portion 51Lb of the second ridge builder 51L protrudes rearward from the second ridge builder 51L. The side connector 53 extends in the vertical direction, with its lower end connected to the rear mounting portion 51Lb of the second ridge builder 51L and its upper end connected to the vertical portion EL1V of the left mounting structure EL. The length of the side connector 53 can be adjusted by moving it in and out of the vertical portion EL1V. By adjusting the length of the side connector 53, the height of the second ridge builder 51L can be adjusted.

The mounting structure of the front mounting portion 51Ra and the rear mounting portion 51Rb of the third ridge creator 51R is similar to the mounting structure of the front mounting portion 51La and the rear mounting portion 51Lb of the second ridge creator 51L, so description thereof will be omitted.
14, the outer ends (ends on the outer side of the machine width) of the second and third ridge creators 51L, 51R in the width direction of the rotary tiller 2 are located outside of the outer end (end on the outer side of the machine width) of the side cover 19C in the width direction of the rotary tiller 2. Specifically, the left end of the second ridge creator 51L is located to the left of the left end of the first side cover 19CL. The right end of the third ridge creator 51R is located to the right of the right end of the second side cover 19CR.

14 and 17 to 19, the first ridge former 51M is disposed in the center in the width direction of the rotary tiller 2. A front mounting portion 51Ma (see FIG. 30) of the first ridge former 51M is attached to the lower part of the transmission case 12 via an intermediate mounting body (not shown) so that its height can be freely adjusted.
The rear mounting portion 51Mb (see FIG. 30) of the first ridge former 51M extends vertically from the rear of the first ridge former 51M, and its upper end is connected to the vertical portion EM1 of the intermediate mounting structure EM. The length of the rear mounting portion 51Mb can be adjusted by moving it in and out of the vertical portion EM1. By adjusting the length of the rear mounting portion 51Mb, the height of the first ridge former 51M can be adjusted.

As shown in Figures 30 to 33, the ridge erector 51 has a bottom plate 51a that forms the bottom surface between the ridges, a side plate 51b that rises diagonally upward from the side edge of the bottom plate 51a and forms the slope of the ridge UN, and a vertical plate 51c that is arranged to the side of the side plate 51b. A space 51d is formed between the vertical plate 51c and the side plate 51b. As shown in Figure 33, the width (length in the machine width direction) of the space 51d increases as it goes downward.

Hereinafter, the term "side plate" will be used as a concept including the side plate 51b and the vertical plate 51c. The side plate may be the side plate 51b, may be the vertical plate 51c, or may be both the side plate 51b and the vertical plate 51c. In this embodiment, the side plate has the side plate 51b and the vertical plate 51c.
The first ridge forming tool 51M has a bottom plate 51a that forms the bottom surface of the first ridge UM1 (see FIG. 19). The side plate 51b includes a first side plate 51b1 that rises obliquely upward from one side edge of the bottom plate 51a to form a slope on one side of the first ridge UNH1, and a second side plate 51b2 that rises obliquely upward from the other side edge of the bottom plate 51a to form a slope on one side of the second ridge UNH2. The vertical plate 51c includes a first vertical plate 51c1 arranged on one side of the first side plate 51b1, and a second vertical plate 51c2 arranged on the other side of the second side plate 51b2. The upper edge of the first side plate 51b1 and the upper edge of the second side plate 51b2 are connected by an upper plate 51j.

31 and 32, the ridge creator 51 (first ridge creator 51M) has a pair of side plates spaced apart from each other, and a space SP that is open downward is formed between the pair of side plates. The space SP may be formed between the pair of side plates 51b, 51b, or may be formed between the pair of vertical plates 51c (the first vertical plate 51c1 and the second vertical plate 51c2).
In this embodiment, the first ridge builder 51M has a pair of side plates 51b, 51b spaced apart from each other, and a space SP that is open downward is formed between the pair of side plates 51b, 51b. The space SP is open downward because a bottom plate 51a is not provided below. The top of the space SP is also open. The space SP is open upward because a top plate 51j is not provided above. The space SP that is open downward and upward is formed by the pair of side plates 51b, 51b extending rearward beyond the bottom plate 51a and the top plate 51j. The space SP is also open rearward.

33, a space 51d is formed between the first vertical plate 51c1 and the first side plate 51b1, and between the second vertical plate 51c2 and the second side plate 51b2. The vertical plate 51c extends downward from the midpoint of the side plate 51b in the height direction.
The vertical plate 51c may be extended to protrude further rearward than the side plate 51b. In this case, the lower portion of the ridge side surface can be scraped off by the vertical plate 51c, and a large amount of soil can be stored in the space 51d.

The first ridge forming device 51M has a first extension plate 51e1 extending rearward from the first vertical plate 51c1, and a second extension plate 51e2 extending rearward from the second vertical plate 51c2.
The first extension plate 51e1 and the second extension plate 51e2 extend in directions approaching each other toward the rear. The rear end of the first extension plate 51e1 is disposed rearward of the rear end of the second extension plate 51e2.

The first extension plate 51e1 is disposed rearward of the first vertical plate 51c1 at a distance therefrom. The second extension plate 51e2 is disposed rearward of the second vertical plate 51c2 at a distance therefrom.
An arm 51f is fixed to the inner surface of the first vertical plate 51c1 and the second vertical plate 51c2. A rod 51g is fixed to the inner surface of the first extension plate 51e1 and the second extension plate 51e2. The rod 51g is inserted into the arm 51f so that its position can be adjusted freely. A lock bolt 51h that fixes the rod 51g to the arm 51f is screwed into the arm 51f.

As shown in Figures 5 to 12, the soil-collecting member D has a soil covering member DS that covers the ends of the mulch film 300F laid by the mulch film laying unit 300B with soil, and a blade BL that guides the soil covered on the ends by the soil covering member DS onto the mulch film 300F that covers the top surface of the ridge UN. This blade BL may also be applied to the high ridge work machine shown in Figures 13 to 19.

As described above, the working machine 1 includes a tilling section 18 that tills the field, a ridge builder 51 that erects and forms ridges UN in the field tilled by the tilling section 18, a mulch film laying section 300B that lays a mulch film 300F on the ridges UN formed by the ridge builder 51, and a soil piling member D that piles soil onto the mulch film 300F laid by the mulch film laying section 300B. The ridge builder 51 has a pair of side plates (side plates 51b, 51b or a vertical plate 51c1 and a second vertical plate 51c2) that are spaced apart from each other, and a space SP that is open downward is formed between the pair of side plates.

This allows the soil to be piled up and left in the space SP. Therefore, the soil piling member D prevents a shortage of soil to cover the mulch film 300F, and a sufficient amount of soil can be covered on the mulch film 300F.
That is, in the past, when the ridges UN were formed by the ridge builder 51 and then the soil was applied to the mulch film 300F by the soil-pile member D, there were cases where the amount of soil to be applied to the mulch film 300F by the soil-pile member D was insufficient. In particular, behind the central ridge builder 51M, the soil had to be distributed and applied to both the left and right ridges, so the amount of soil was likely to be insufficient. In this embodiment, the soil can be piled up and left in the space SP, so that the soil to be applied to the mulch film 300F by the soil-pile member D does not run out. Therefore, a sufficient amount of soil can be applied to the mulch film 300F. In addition, since the soil can be left in the space 51d, a sufficient amount of soil can be piled up on the mulch film 300F by the soil-pile member D.

If a sufficient amount of soil can be left in the space 51d, the space SP with an open downwards may not be formed between the pair of side plates 51b, 51b. For example, if the vertical plate 51c is extended and protrudes rearward beyond the side plate 51b, instead of forming the space SP with an open downwards between the pair of side plates 51b, 51b, the space SP with an open downwards may be formed between the first vertical plate 51c1 and the second vertical plate 51c2.

In addition, the second ridge creator 51L and the third ridge creator 51R may have the same configuration as the first ridge creator 51M.
34 and 35 are diagrams showing another embodiment (hereinafter referred to as the second embodiment) of the ridge forming tool 51. This ridge forming tool 51 is preferably used as the first ridge forming tool 51M.
Below, the ridge creator 51 of the second embodiment will be described, focusing on the differences from the ridge creator 51 of the above-mentioned embodiment (hereinafter referred to as the first embodiment) (see Figures 30 to 33), and a description of the common configuration will be omitted.

The ridge creator 51 (first ridge creator 51M) has a pair of side plates 51b, 51b spaced apart from each other, and a space SP that is open downward is formed between the pair of side plates 51b, 51b. The space SP is open downward because there is no bottom plate 51a provided below. The ridge creator 51 does not have a bottom plate 51a. Therefore, the space between the pair of side plates 51b, 51b is open downward over the entire area from the front end to the rear end of the side plates 51b, 51b. In other words, the space SP that is open downward is formed over the entire area from the front end to the rear end of the side plates 51b, 51b. Preferably, the space SP that is open downward is formed over the entire area from the front end to the rear end of the ridge creator 51, but it is sufficient that it is formed in at least a part of the entire area from the front end to the rear end of the ridge creator 51.

The space SP is also open at the top. The space SP is open at the top because there is no upper plate 51j provided at the top. The ridge creator 51 does not have an upper plate 51j. Therefore, the space between the pair of side plates 51b, 51b is open at the top over the entire area from the front end to the rear end of the side plates 51b, 51b. In other words, the space SP with an open top is formed over the entire area from the front end to the rear end of the side plates 51b, 51b. Preferably, the space SP with an open top is formed over the entire area from the front end to the rear end of the ridge creator 51, but it is sufficient that it is formed in at least a part of the entire area from the front end to the rear end of the ridge creator 51.

The space SP, which is open at the bottom and top, is formed by the absence of the bottom plate 51a and the top plate 51j that connect the pair of side plates 51b, 51b. The space SP is also open at the rear.
Each of the pair of side plates 51b, 51b has a vertical plate 51k that rises vertically from the ground and a diagonal plate 51m that extends diagonally upward from the upper edge of the vertical plate 51k. The diagonal plate 51m of one side plate 51b and the diagonal plate 51m of the other side plate 51b are gradually separated from each other as they go upward. The ridger 51 does not have a vertical plate 51c, and the vertical plate 51k is provided at a position corresponding to the vertical plate 51c.

A front extension 51n is provided at the front of the pair of side plates 51b, 51b, which approaches each other as it moves forward. A front attachment portion 51Ma is provided at the front end of the front extension 51n. The front extension 51n has a notch 51p formed between the pair of side plates 51b, 51b to allow soil to be introduced. The notch 51p is formed by cutting out the lower part of the front extension 51n. The notch 51p is formed from the front end to the rear end of the front extension 51n, but may be formed in a part of the front extension 51n. The notch 51p is located in front of the vertical plate 51k. The notch 51p is connected to the space SP.

The first extension plate 51e1 extends toward the rear of one of the pair of side plates 51b, 51b (first side plate 51b1). The second extension plate 51e2 extends toward the rear of the other of the pair of side plates 51b, 51b (second side plate 51b2). The first extension plate 51e1 and the second extension plate 51e2 extend in directions approaching each other toward the rear. The rear end of the first extension plate 51e1 is located rearward of the rear end of the second extension plate 51e2.

The first extension plate 51e1 is disposed at the rear of one side plate (first side plate 51b1) behind the first vertical plate 51c1 at a distance from the one side plate (first side plate 51b1). The second extension plate 51e2 is disposed at the rear of the other side plate (second side plate 51b2) at a distance from the other side plate (second side plate 51b2).
As shown in Fig. 17, the film pressing roller 333H is disposed behind the first extension plate 51e1. The film pressing roller 332H is disposed behind the second extension plate 51e2. The first extension plate 51e1 and the film pressing roller 333H overlap in the machine width direction. The second extension plate 51e2 and the film pressing roller 332H overlap in the machine width direction.

This allows the first extension plate 51e1 and the second extension plate 51e2 to scrape and remove the soil at the bottom of the ridges in front of the film pressing rollers 332H, 333H. Therefore, the edge of the mulch film comes to the point where the ridges have collapsed, which prevents the edge of the mulch film from being positioned at the bottom of the ridges, and ensures that the edge of the mulch film is in contact with the bottom of the ridges.

The ridge builder 51 (first ridge builder 51M) of the second embodiment allows soil to be introduced between the pair of side plates 51b, 51b through the cutout 51p, so a large amount of soil can be left in the space SP. In addition, the space between the pair of side plates 51b, 51b is open at the bottom and top, so a large amount of soil can be piled up and left in the space SP. Therefore, a sufficient amount of soil can be piled up on the mulch film 300F by the soil piling member D.

<Suspension structure of the mounting arm of the multi-film laying device>
As shown in Figure 2, the rotary cultivator 2 has a rotary machine frame 11, and the transplanter 3 has a transplanter frame 37. The rotary machine frame 11 and the transplanter frame 37 are connected to each other so as to be movable up and down by a connecting mechanism 41 consisting of a parallel link mechanism. This allows the rotary cultivator 2 and the transplanter 3 to move relative to each other in the vertical direction. In other words, the transplanter 3 (transplanter frame 37) is movable up and down relative to the rotary cultivator 2.

The front chairs 187A, B are mounted on the rotary machine frame 11 via a connecting mechanism 41 so as to be vertically movable. The rear chairs 187C, D are mounted on a seat frame 197 which is connected to the rotary machine frame 11 via a parallel link mechanism 200. The seat frame 197 is supported on the field by wheels 206.
As shown in Figure 36, the attachment arm EL2 of the mulch-film laying device 300 is pivoted by a pivot shaft SZ to be vertically movable relative to the rotary frame 11. The same is true for the attachment arms ER2 and EM2. The attachment arm EL2 and the transplanter frame 37 are connected via a chain CHN. The chain CHN is connected to the chain attachment part EL6 shown in Figure 20 and the chain attachment part EM5 shown in Figure 22. As a result, the mulch-film laying device 300 rises as the transplanter frame 37 rises (see arrows Y4 and Y5 in Figure 36).

FIG. 37 is an explanatory diagram of the up and down movement of the connecting mechanism 41.
The connecting mechanism 41 has a lower link 44A and an upper link 44C. A cylinder of the lifting drive device 42 is connected to the upper link 44C. When the lower link 44A swings up and down around the support shaft 161L by driving the lifting drive device 42, the upper link 44C swings up and down around the support shaft 161M. As a result, the chairs (first front chair 187A and second front chair 187B) supported by the chair support 150 and the transplanter 3 rise and fall together. Here, since the connecting link mechanism 44 is configured as a parallel link mechanism, the chairs 187A, 187B and the transplanter 3 rise and fall parallel to the ground.

The lifting drive device 42 has a lifting cylinder (hydraulic actuator) C1. The lifting cylinder C1 is composed of a hydraulic cylinder having a cylinder body C1a and a piston rod C1b. The tip of the piston rod C1b is pivoted to an upper support shaft 162. The upper support shaft 162 is attached to the middle of the upper link 44C in the front-to-rear direction. The bottom side of the cylinder body C1a is pivoted to a lower support shaft 163. The lower support shaft 163 is attached to the rotary machine frame 11.

When the lifting cylinder C1 is extended (the piston rod C1b is advanced from the cylinder body C1a), the upper link 44C and the lower link 44A swing upward, and the chairs (first front chair 187A and second front chair 187B) supported by the chair support 150 and the transplanter 3 (frame 37) rise. When the lifting cylinder C1 is shortened (the piston rod C1b is retracted), the upper link 44C and the lower link 44A swing downward, and the chairs (first front chair 187A and second front chair 187B) supported by the chair support 150 and the transplanter 3 (frame 37) fall. The lifting drive device 42 may be composed of an electric cylinder (electric actuator) or an electric hydraulic cylinder (electric hydraulic actuator).

The work machine 1 of this embodiment provides the following advantages.
The working machine 1 comprises a tilling section 18 for tilling the field, and a furrow cutting member Z for cutting furrows in the field tilled by the tilling section 18 to form ridges UN. The tilling section 18 has tilling tines 17 which rotate around a horizontal shaft 16, a rotary machine frame 11 which rotatably supports the horizontal shaft 16, and a rear cover 19B which is attached to the rotary machine frame 11 so as to be swingable in the vertical direction and covers the rear of the tilling tines 17. The furrow cutting member Z is attached to the rear cover 19B and can swing together with the rear cover 19B.

With this configuration, the furrow cutting member Z moves up and down together with the rear cover 19B as the tilling depth changes. Because the rear cover 19B swings up and down relative to the rotary machine frame 11, the lower end of the rear cover 19B always stays in contact with the ground even if the tilling depth changes. Therefore, by the furrow cutting member Z swinging together with the rear cover 19B, the furrow depth remains constant even if the tilling depth changes.

In addition, the groove cutting member Z is attached to a mounting frame X attached to the rear cover 19B, and is movable along the mounting frame X in a direction parallel to the horizontal shaft 16.
This configuration makes it easy to change the width of the ridges UN formed by the groove cutting member Z.
The device also includes a mulch film laying device 300 that lays a mulch film 300F on the ridges UN, and the mulch film laying device 300 has a film pressing roller C that presses the widthwise ends of the laid mulch film 300F, and the film pressing roller C rolls along the grooves cut by the groove cutting member Z to bend the ends.

According to this configuration, the film pressing roller C rolls along the groove cut by the groove cutting member Z, so that the end of the mulch film 300F can be reliably folded and pressed along the side surface of the ridge UN.
The mulch film laying device 300 also has a soil covering member DS that covers the end of the mulch film 300F folded by the film pressing roller C with soil.

According to this configuration, the soil covering member DS can cover the ends of the mulch film 300F with soil, thereby preventing the mulch film 300F from being rolled up by the wind.
It also includes a planting device 39 that plants seedlings in the ridges UN on which the mulch film 300F is laid, an irrigation tube KY1 that supplies water to the seedlings planted by the planting device 39, and an irrigation tube guide KY that supports the irrigation tube KY1, and the irrigation tube guide KY is attached to the mounting frame X.

According to this configuration, the mounting frame X is attached to the rear cover 19B and follows the field surface, so that the irrigation tube guide KY attached to the mounting frame X also follows the field surface, and the irrigation tube KY1 supported by the irrigation tube guide KY also follows the field surface, ensuring reliable water supply to the seedlings planted in the field.
The groove cutting member Z also has a bottom plate Z1 which is rectangular in plan view and forms the bottom surface of the groove, a front plate Z2 which rises diagonally forward and upward from the front edge of the bottom plate Z1, a rear plate Z3 which rises upward from the rear edge of the bottom plate Z1, and a side plate Z4 which rises upward from the side edge of the bottom plate Z1.

With this configuration, the bottom plate Z1 is a rectangular plate when viewed from above, so the bottom surface of the furrow is flat. Because the front plate Z2 is inclined, the tilled soil is compacted downwards and furrow cutting resistance is reduced. The rear plate Z3 prevents soil from entering the interior of the furrow cutting member Z. The side plates Z4 form the sides of the ridges, which are nearly vertical and allow the top surface of the ridges to be formed with a wide width. The bottom of the furrow can be compacted.

The groove cutting member Z also includes a plurality of groove cutting members Z for forming a plurality of ridges UN, and the plurality of groove cutting members Z are attached to the mounting frame X at intervals in a direction parallel to the horizontal axis 16.
With this configuration, the width of the multiple ridges UN can be easily changed.
The working machine 1 also comprises a tilling section 18 that rotates around an axis 16 extending in the width direction of the machine to till the field, a ridge forming device A that forms ridges UN in the field tilled by the tilling section 18, a mulch film laying section 300B that lays a mulch film 300F on the ridges UN, and a soil piling member D that piles soil onto the mulch film 300F, the soil piling member D having a soil covering member DS that covers the ends of the mulch film 300F with soil, and a blade BL that is positioned inward in the width direction of the machine from the soil covering member DS and guides the soil covered on the ends onto the mulch film 300F that covers the upper surface of the ridges UN, the blade BL being constructed separately from the soil covering member DS, and being positioned at an angle to the soil covering member DS in a plan view, extending toward the inside in the width direction of the machine.

According to this configuration, the soil piled up by the soil covering member DS can be guided onto the mulch film 300F by the blade BL and covered with soil.
In addition, the inner end of the soil covering member DS in the machine width direction and the outer end of the blade BL in the machine width direction coincide or overlap in the machine width direction.
According to this configuration, the soil piled up by the soil covering member DS can be efficiently guided by the blade BL onto the mulch film 300F and covered with soil.

In addition, the soil covering member DS is arranged at an incline in a plan view so as to move inward in the width direction of the machine as it moves rearward.
According to this configuration, the soil can be easily gathered by the soil covering member DS.
It also includes an angle adjustment mechanism EL8 that can adjust the angle of inclination of the soil covering member DS.
This configuration allows the amount of soil to be adjusted.

The ridge forming device A also includes a furrow cutting member Z that cuts furrows in the field to form flat ridges, and a ridge erector 51 that erects ridges in the field to form high ridges, and is equipped with a mounting structure E to which a flat ridge member used together with the furrow cutting member Z and a high ridge member used together with the ridge erector 51 can be selectively attached.
According to this structure, by selectively attaching the flat ridge members and the high ridge members to the mounting structure E, one working machine can be used for both flat ridges and high ridges.

The flat ridge member includes a first soil covering member that covers the widthwise end of the mulch film 300F laid on the flat ridge, and the high ridge member includes a second soil covering member that covers the widthwise end of the mulch film 300F laid on the high ridge, and the mounting structure E has a first mounting portion EL21 to which the first soil covering member can be attached, and a second mounting portion EL22 to which the second soil covering member can be attached.

According to this configuration, a first soil covering member that covers with soil the widthwise ends of the mulch film 300F laid on flat ridges, and a second soil covering member that covers with soil the widthwise ends of the mulch film 300F laid on high ridges can be selectively attached to a single work machine.
In addition, the flat ridge member includes a first film holding roller that holds down the widthwise end of the mulch film laid on the flat ridges, and the high ridge member includes a second film holding roller that holds down the widthwise end of the mulch film laid on the high ridges, and the mounting structure E has a third mounting portion EL23 to which the first film holding roller can be attached, and a fourth mounting portion EL24 to which the second film holding roller can be attached.

With this configuration, a first film holding roller for holding down the widthwise end of the mulch film laid on the flat ridges, and a second film holding roller for holding down the widthwise end of the mulch film laid on the high ridges can be selectively attached to a single work machine.
In addition, the flat ridge member includes a blade BL, and the mounting structure E has a fifth mounting portion EL25 to which the blade BL can be attached.

According to this configuration, a blade BL, which is a flat ridge member, can be attached to the working machine as needed.
The working machine 1 also comprises a ridge forming device A that forms ridges UN in the field, a mulch film laying device 300 that lays a mulch film 300F on the ridges UN, and a planting device 39 that plants seedlings in the ridges UN on which the mulch film 300F has been laid.The mulch film laying device 300 has a soil covering member DS that covers the ends of the mulch film 300F with soil, and a blade BL that is positioned forward of the planting device 39 and guides the soil that has been covered on the ends by the soil covering member DS onto the mulch film 300F that covers the top surface of the ridges UN.

With this configuration, the blade BL covers the mulch film 300F with soil before the planting device 39 makes holes (planting holes) in the mulch film 300F, preventing the mulch film 300F from being torn off by strong winds, etc. In addition, the blade BL levels out the soil on the mulch film 300F, preventing the seedlings from being buried in the soil.

The ridge forming device A also includes a tilling section 18 for tilling the field, and a furrow cutting member Z for cutting furrows in the field tilled by the tilling section 18 to form ridges UN.
According to this configuration, after laying the mulch film 300F on a ridge UN (flat ridge) formed by cutting a trench in the field using a trench cutting member Z, soil can be covered on the mulch film 300F using a soil covering member DS and a blade BL, thereby preventing the mulch film 300F from peeling off.

In addition, the soil covering member DS is disposed behind the groove cutting member Z, and the blade BL is disposed behind the soil covering member DS.
According to this configuration, after forming ridges UN (flat ridges) using the groove cutting member Z, soil can be piled up on the formed ridges UN (flat ridges) using the soil covering member DS, and the piled up soil can be covered onto the mulch film 300F using the blade BL.

In addition, the soil covering member DS is positioned so as to overlap the groove cutting member Z in the width direction of the mulch film 300F, and the blade BL extends from the end side toward the center of the mulch film 300F.
With this configuration, soil can be reliably piled onto the ridges UN (flat ridges) formed by the groove cutting member Z using the soil covering member DS, and the piled soil can be evenly covered from the end side of the mulch film 300F toward the center using the blade BL.

In addition, the soil covering member DS and the blade BL are formed separately.
According to this configuration, the soil covering member DS and the blade BL can be replaced individually during maintenance, etc. The positional relationship between the soil covering member DS and the blade BL can be adjusted.
In addition, the soil covering member DS and the blade BL are formed integrally.
According to this configuration, the soil covering member DS and the blade BL can be attached and detached as a unit, and the positional relationship between the soil covering member DS and the blade BL can be fixed.

The work machine 1 also includes a mulch film laying device 300 that lays a mulch film 300F on the ridges UN formed in the field. The mulch film laying device 300 has a roll support shaft 300J that is penetrated by the film roll 300R on which the mulch film 300F is wound and supports the film roll 300R over its entire length, a first support part J1 that supports one end of the roll support shaft 300J, and a second support part J2 that supports the other end of the roll support shaft 300J. One end of the roll support shaft 300J is detachable from the first support part J1, and the other end can swing around the second support part J2 as a fulcrum.

According to this configuration, the roll support shaft 300J swings, which makes it easy to attach and detach the multi-film roll 300R, which is a heavy object, to and from the roll support shaft 300J.
The other end of the roll support shaft 300J can swing up and down with the other support part J2 as a fulcrum.
According to this configuration, the roll support shaft 300J swings up and down, which makes it easy to attach and detach the multi-film roll 300R, which is a heavy object, to and from the roll support shaft 300J.

In addition, the roll support shaft 300J includes a first roll support shaft 301 that supports the multi-film 300F attached to the first ridge UN1, and a second roll support shaft 302 that supports the multi-film 300F attached to the second ridge UN2 adjacent to the first ridge UN1, and the first roll support shaft 3011 and the second roll support shaft 302 are capable of swinging independently.
According to this configuration, the multi-film roll 300R can be easily attached to and detached from each of the support shafts 301 and 302 individually.

The one-side support portion J1 includes a first one-side support portion J1a that supports one end side of the first roll support shaft 301 and a second one-side support portion J1b that supports one end side of the second roll support shaft 302, and the other-side support portion J2 includes a first other-side support portion J2a that supports the other end side of the first roll support shaft 301 and a second other-side support portion J2b that supports the other end side of the second roll support shaft 302.
According to this configuration, the multi-film roll 300R can be easily attached to and detached from each of the support shafts 301 and 302 individually.

In addition, the first other side support portion J2a supports the other end side of the first roll support shaft 301 between the first ridge UN1 and the second ridge UN2, and the second other side support portion J2b supports the other end side of the second roll support shaft 302 between the first ridge UN1 and the second ridge UN2.
According to this configuration, the multi-film roll 300R can be attached and detached from both sides in the machine width direction, making it possible to easily perform the attachment and detachment.

Further, the one support part J1 and the other support part J2 are movable parallel to the axial direction of the roll support shaft 300J.
According to this configuration, the position and width of the multi-film roll 300R can be changed in accordance with the position and width of the ridges UN.
In addition, the roll support shaft 300J is formed in a cylindrical shape, and the other support part J2 has a support rod J3 that is inserted into the other end side of the roll support shaft 300J to support the other end side, a through shaft J3a that passes through the support rod J3, and a holding member J3b that holds the roll support shaft 300J rotatably around the axis of the through shaft J3a.

According to this configuration, the roll support shaft 300J can be tilted easily and reliably.
In addition, the other support part J2 has a locking member J4 that is arranged movably along the roll support shaft 300J and is movable between an allowable position that allows the roll support shaft 300J to rotate and a locked position that does not allow the roll support shaft 300J to rotate.
According to this configuration, when tilting of the roll support shaft 300J is not necessary, the roll support shaft 300J can be prevented from tilting.

The working machine 1 also includes a tilling section 18 that tills the field, a ridge builder 51 that erects and forms ridges UN in the field tilled by the tilling section 18, a mulch film laying section 300B that lays a mulch film 300F on the ridges UN formed by the ridge builder 51, and a soil piling member D that piles soil onto the mulch film 300F laid by the mulch film laying section 300B. The ridge builder 51 has a pair of side plates (side plates 51b, 51b or a vertical plate 51c1 and a second vertical plate 51c2) that are spaced apart from each other, and a space SP that is open downward is formed between the pair of side plates.

According to this configuration, the soil can be piled up and left in the space SP. Therefore, the soil piling member D prevents a shortage of soil to cover the mulch film 300F, and a sufficient amount of soil can be covered on the mulch film 300F.
Conventionally, after forming the ridges UN with the ridge creator 51, when the soil is applied to the mulch film 300F with the soil piling member D, there are cases where there is not enough soil to cover it. In particular, behind the central ridge creator 51M, soil must be distributed and applied to both the left and right ridges, so it is easy for the soil to run out. In this embodiment, soil can be piled up and left in the space SP, so it is possible to prevent the soil piling member D from running out of soil to cover the mulch film 300F.

In addition, the ridge builder 51 has a bottom plate 51a that forms the bottom surface between the ridges, and the side plates include a side plate 51b that rises diagonally upward from the side edge of the bottom plate 51a and a vertical plate 51c that is arranged to the side of the side plate 51b, and a space is formed between the vertical plate 51c and the side plate 51b.
According to this configuration, the soil can be piled up and left in the space 51d between the vertical plate 51c and the side plate 51b, so that it is possible to prevent a situation in which there is not enough soil to cover the mulch film 300F with the soil-pile member D.

The ridge erector 51 includes a first ridge erector 51M that forms the slope on one side of the first ridge UN1 and the slope on one side of the second ridge UN2 that are adjacent to each other across the first ridge space, a second ridge erector 51L that forms the slope on the other side of the first ridge UN1, and a third ridge erector 51R that forms the slope on the other side of the second ridge UN2. The first ridge erector 51M has a bottom plate 51a that forms the bottom surface between the first ridges UN1 and a side plate 51b that rises obliquely upward from one side edge of the bottom plate 51a and forms the slope on one side of the first ridge UN1. The vertical plate 51c includes a first side plate 51b1 that forms a slope and a second side plate 51b2 that rises diagonally upward from the other side edge of the bottom plate 51a to form a slope on one side of the second ridge UN2, and the vertical plate 51c includes a first vertical plate 51c1 arranged on one side of the first side plate 51b1 and a second vertical plate 51c2 arranged on the other side of the second side plate 51b2, and a space 51d is formed between the first vertical plate 51c1 and the first side plate 51b1, and between the second vertical plate 51c2 and the second side plate 51b2.

According to this configuration, it is possible to pile up soil in the space 51d and leave a large amount of soil.
The vertical plate 51c extends downward from the middle of the first side plate 51b1 in the height direction.
This configuration ensures that the upper part of the side of the ridge UN is inclined, and the lower part of the side can be made vertical, ensuring that the end of the mulch film 300F is folded in. In addition, the vertical plate 51c is prevented from interfering with the creation of the ridges, while the space 51d is secured and soil can be left in the space 51d.

In addition, a front extension 51n is provided at the front of the pair of side panels (side panels 51b, 51b), which approaches each other as it moves forward, and a notch 51p is formed in the front extension 51n for allowing soil to be introduced between the pair of side panels (side panels 51b, 51b).
According to this configuration, soil can be introduced between the pair of side plates 51b, 51b through the cutout 51p, so that a large amount of soil can be left in the space SP.

In addition, a space SP that is open upward is formed between the pair of side plates (side plates 51b, 51b).
According to this configuration, a large amount of soil can be piled up and left in the space SP.
In addition, the first ridge builder 51M has a first extension plate 51e1 extending toward the rear of one of the pair of side plates (side plate 51b1 or the first vertical plate 51c1) of the pair of side plates (side plate 51b, 51b or the first vertical plate 51c1 and the second vertical plate 51c2), and a second extension plate 51e2 extending toward the rear of the other of the pair of side plates (side plate 51b, 51b or the first vertical plate 51c1 and the second vertical plate 51c2) of the pair of side plates (side plate 51b, 51b or the first vertical plate 51c1 and the second vertical plate 51c2), and the first extension plate 51e1 and the second extension plate 51e2 extend in directions approaching each other as they approach the rear.

This configuration allows the soil stored in the space 51d to move toward the center. In addition, the first extension plate 51e1 and the second extension plate 51e2 can scrape off the bottom of the ridges so that the soil can flow backwards. This prevents the mulch film from coming to a place where the ridges have collapsed, causing the edge of the mulch film to be unable to be positioned at the bottom of the ridges.
Further, the rear end of the first extension plate 51e1 is disposed rearward of the rear end of the second extension plate 51e2.

According to this configuration, by positioning the soil-pile member 323H arranged behind the first extension plate 51e1 rearward of the soil-pile member 322H arranged behind the second extension plate 51e2, the amount of soil piled up by the soil-pile member 323H and the amount of soil piled up by the soil-pile member 322H can be equalized.
In addition, the first extension plate 51e1 is positioned behind one of the side plates (side plate 51b1 or first vertical plate 51c1) at a distance from the one side plate, and the second extension plate 51e2 is positioned behind the other side plate (side plate 51b2 or second vertical plate 51c2) at a distance from the other side plate.

With this configuration, excess soil can be released between the first extension plate 51e1 and one of the side plates and between the second extension plate 51e2 and the other side plate, allowing an appropriate amount of soil to be placed on the mulch film 300F.
In addition, the soil-gathering member D has a soil covering member DS that covers the ends of the mulch film 300F laid by the mulch film laying section 300B with soil, and a blade BL that guides the soil covered on the ends by the soil covering member DS onto the mulch film 300F that covers the upper surface of the ridge UN.

With this configuration, the blade BL can guide the soil onto the mulch film 300F.
Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims.

REFERENCE SIGNS LIST 1 Working machine 11 Rotary machine frame 16 Horizontal shaft 17 Cultivation tines 18 Cultivation section 19B Rear cover 39 Planting device 300 Mulch film laying device 300F Mulch film C Film pressing roller DS Soil covering member KY Irrigation tube guide KY1 Irrigation tube UN Ridge X Mounting frame Z Groove cutting member Z1 Bottom plate Z2 Front plate Z3 Rear plate Z4 Side plate

Claims (7)

A tilling section for tilling the fields;
A furrow cutting member that cuts a furrow in the field cultivated by the tilling unit to form a ridge;
Equipped with
The tilling unit includes a tilling claw that rotates around a horizontal shaft, a rotary machine frame that rotatably supports the horizontal shaft, and a rear cover that is attached to the rotary machine frame so as to be swingable in the vertical direction and covers the rear of the tilling claw.
The furrow cutting member is a ridge forming device for forming flat ridges in a farm field, and is a work machine that is attached to the rear cover and can swing together with the rear cover. The work machine according to claim 1, wherein the groove cutting member is attached to a mounting frame attached to the rear cover and is movable along the mounting frame in a direction parallel to the horizontal axis. A mulch film laying device is provided for laying a mulch film on the ridges,
The mulch film laying device has a film pressing roller that presses the end of the laid mulch film in the width direction,
3. The work machine according to claim 1, wherein the film pressing roller rolls along the groove cut by the groove cutting member to bend the end portion. The work machine according to claim 3, wherein the mulch film laying device has a soil covering member that covers the end of the mulch film folded by the film pressing roller with soil. A mulch film laying device that lays a mulch film on the ridges;
A planting device that plants seedlings in the furrows on which the mulch film is laid;
an irrigation tube for supplying water to the seedlings planted by the planting device;
an irrigation tube guide for supporting the irrigation tube;
Equipped with
3. The work machine according to claim 2, wherein the irrigation tube guide is attached to the mounting frame. The working machine according to any one of claims 1 to 5, wherein the groove cutting member has a bottom plate made of a flat plate having a rectangular shape in a plan view that forms the bottom surface of the groove, a front plate that rises diagonally forward and upward from the front edge of the bottom plate, a rear plate that rises upward from the rear edge of the bottom plate, and side plates that rise vertically upward from the side edges of the bottom plate and form the sides of the ridges approximately vertically. The groove cutting member includes a plurality of groove cutting members for forming a plurality of ridges,
6. A work machine according to claim 2 or 5, wherein the plurality of groove cutting members are attached to the mounting frame at intervals in a direction parallel to the horizontal axis.

Images